Battery replacement

This page helps you replace a worn battery in a keyboard half or a module: what each original cell is, what a replacement must match, and which cells you can actually buy. The one thing to know first: no seller we could find offers any of the four original cells, so every replacement is a close substitute that needs checking with a meter and, usually, a new plug on its lead. Read Safety before you open anything; the power model itself is on Power and batteries.

At a glance

• Four batteries: each half has a 50 mAh pouch cell; the Tune a 1000 mAh block pack; the Touch a 700 mAh pouch cell; the Track a 600 mAh pack of two 300 mAh cells in parallel. All are 3.7 V lithium polymer with a three-wire lead.
• The labels (FH301217, FH 202030, FH364046, QS801630 1S2P) are size codes; the makers behind FH and QS are not identified, and no exact source was found (checked 2026-09-23).
• The third wire is almost certainly a thermistor. The modules' charger expects a 10 kΩ NTC of the 103AT type; the half's charger is unidentified.
• The plugs look like 3-way JST SH-class (1.0 mm) housings on the half, Touch and Track, and a JST ZH-class (1.5 mm) housing on the Tune. Confirm with calipers before you buy.
• Match the original capacity where you can: the charge current is fixed on the board and not known, so a smaller cell charges harder than the original did.
• The FCC photos show pre-production units. Read the label on your own battery before you order: retail capacities may differ (details).

The batteries at a glance

Replacement listings were read on 2026-09-23; none has been bought or tested. "Fits" means it fits every dimension we know; the spaces inside the half and the modules have not been measured (Measurements that would confirm fit).

Device	Original, as labeled	Rating	Size	Plug	Recommended replacement	Evidence
Each keyboard half	FH301217 pouch cell with a protection board	3.7 V, 50 mAh, 0.185 Wh	3.0 x 12 x 17 mm by its code; about 12.5 x 18.5 mm with the folded protection board	3-way, JST SH class (1.0 mm), likely	YDL 301215 (3.0 x 12 x 17 mm with its protection board, 30 mAh) ordered with the SH 1.0 plug and NTC options; capacity is lower, see the caveat	DOC INFERRED REPORTED
Tune	FH 202030 block pack in blue PVC	3.7 V, 1000 mAh, 3.7 Wh	20 x 20 x 30 mm by its code (inferred); label face about 34 x 20 mm	3-way, JST ZH class (1.5 mm)	a 1S2P pack of two LiPol LP902030 (9.0 x 20 x 30 mm, 500 mAh each) with one 10 kΩ NTC and a ZH plug	DOC INFERRED REPORTED
Touch	FH364046 pouch cell (a sample FH364045 also photographed)	3.7 V, 700 mAh, 2.59 Wh	3.6 x 40 x 46 mm by its code; about 40 x 45 mm	3-way, JST SH class (1.0 mm); board header J3	LiPol LP304045 (3.0 x 40 x 45 mm, 500 mAh) with a protection board, 10 kΩ NTC and SH plug; a custom 700 mAh cell for full capacity	DOC INFERRED REPORTED
Track	QS801630 1S2P pack of two QS801630 cells	3.7 V, 600 mAh, 2.22 Wh (2 x 300 mAh, 1.11 Wh)	each cell 8.0 x 16 x 30 mm by its code	3-way, JST SH class (1.0 mm), likely	a 1S2P pack of two LiPol LP801530 (8.0 x 15 x 30 mm, 300 mAh each) with one 10 kΩ NTC	DOC INFERRED REPORTED

The dongle has no battery; it runs from USB DOC³. The full part rows, with every photo citation, are on the Parts list.

Safety

Lithium polymer cells can burn

Every battery in the Create is a lithium polymer cell. Do not puncture, bend, crush or heat it, and do not cut through its tape or wrap with a blade: the protection board and tabs sit right under the tape. Work on a clear, non-flammable surface, keep metal tools away from bare tabs and contacts, and never short the leads. Charge a new cell for the first time where you can watch it, and stop if it gets warm, smells or swells. The vendor's manuals give the operating range as 0-60 °C and say not to short-circuit the pogo pins, the battery or its cells DOC⁴⁵.

Never trust wire colors: check polarity with a meter

Sellers wire the same connector in different orders, and JST-style battery plugs are often sold with the polarity reversed against a given board. The original Track lead is red, yellow and black, the others red, white and black; do not assume a new cell follows either. Before a new battery goes near the board, measure it with a multimeter: the pair that reads about 3.7-4.2 V is the cell (note which pin is positive), and the third pin should read a resistance of about 10 kΩ to the negative pin at room temperature (the thermistor). Compare against the board's pin order, which is not yet established for any of the four connectors (details). A reversed cell can destroy the charger at once. Untested by us; we have not opened a battery compartment.

A protection board is required

Buy only cells or packs with a protection circuit module (PCM): the small board that cuts the cell off on overcharge, over-discharge, overcurrent and short circuit. The original half and Touch cells carry one folded under yellow tape; the Tune and Track packs hide theirs inside the wrap DOC INFERRED. A bare cell relies on the board alone, and the Create's boards were designed for protected packs. When two cells are joined in parallel, each should have its own PCM, or the pack one PCM rated for both.

Do not exceed the original thickness

A thicker cell presses on the board, the Qi coil or the case when the module or half is closed, and pressure on a pouch cell can short it internally. Keep every replacement at or below the original thickness (half 3.0 mm, Touch 3.6 mm, Track 8.0 mm per cell, Tune about 20 mm for the whole pack), and at or below its width and length unless you have measured spare room. Never force a lid closed over a battery.

Swollen, damaged or deeply drained cells

A cell that has puffed up, leaks, is dented, or has sat fully drained for a long time is damaged. Do not charge it, do not puncture it, and do not reuse it. Tape its leads, keep it in a non-flammable container away from anything combustible, and take it to a battery recycling or household hazardous waste point; never put it in household trash. The Create's labels carry the WEEE crossed-bin mark, and the v1.0.6 manual asks for the battery to be removed and recycled separately at end of life DOC⁴². A lithium cell held near 0 V for long may be unsafe to recharge even if it seems to recover INFERRED (general lithium-ion practice).

Battery Zero: a module drained to 0 % may not recover

Long docking can drain a module until its battery protection makes it unchargeable; the vendor called this "Battery Zero", announced firmware and hardware changes and a recovery mode, and the manual advises undocking modules for long storage DOC¹¹⁵. A dark module is not necessarily a dead battery: try the module recovery key first (R9 Module dead), which revived an unresponsive Tune and Touch on one of our boards MEASURED (a second board, 3.28.7, modules on 2.1.2, 2026-09-19). Replace the pack only if the module stays dead, and treat a pack that was stuck at 0 % as damaged (previous box).

What every replacement must match

These criteria apply to all four batteries; each section below gives the numbers.

• Chemistry and voltage. 3.7 V nominal lithium polymer (or lithium-ion) with a 4.2 V full-charge voltage. The labels print 3.7 V, the v1.0.6 manual gives "Input Voltage 4.2V"⁴, full halves read 4.07-4.21 V and full modules 4.12-4.26 V while on USB DOC MEASURED (Power). The modules' SG Micro SGM41523 charger charges to 4.2 V when its voltage-select pin is grounded or open, and can be set anywhere from 4.1 to 4.45 V DOC¹²; the setting on Naya's boards has not been read (details). Do not use LiFePO4 (3.2 V) cells.
• Size. At or under the original in every dimension, and never thicker (above). Cell sizes are quoted as thickness x width x length; check whether a listing's length includes the protection board.
• Protection board. Required (above).
• Thermistor. Keep the three-wire lead with a 10 kΩ NTC. The modules' charger reads it on its TS pin and suspends charging outside about 0-60 °C, and cuts current to a tenth between 0 and 10 °C and between 45 and 60 °C; its datasheet recommends a 103AT-2 type (10 kΩ at 25 °C, 27.28 kΩ at 0 °C, 3.02 kΩ at 60 °C) DOC¹². The boards carry an NTC pad beside every battery header and the modules' RT1/RT2 bias resistors beside the charger DOC¹. A cell without a thermistor may refuse to charge, and a fixed resistor in its place would defeat the temperature cut-off, so we do not recommend either INFERRED. Ask for a 10 kΩ NTC with B = 3380-3435 K, which tracks the 103AT; a common 3950 K part reads colder at 0 °C and hotter at 60 °C, so it stops charging slightly early at both ends, the safe direction INFERRED (from the datasheet thresholds). The half's charger is not identified, so the value it expects is not known; 10 kΩ is the common choice (details).
• Capacity and charge rate. Choose the original capacity or more. The modules' charge current is set by a resistor on the board (10 300 V divided by the resistor, so 20 kΩ gives about 0.52 A) DOC¹², and the module bases are rated Input: 5V⎓500mA, so the charge current is probably no more than about 0.5 A INFERRED. The small cells listed below are rated for 0.5C at most (0.5 x their capacity in amps) REPORTED; a cell of the same capacity as the original is charged at the same rate the original was, while a smaller one is charged harder. Until the charge settings are measured (details), a lower-capacity cell is a compromise, flagged as such below.
• Lead length. At least as long as the original's (each section gives an estimate from the photos), so the plug reaches the header without strain.
• Connector. The same series, pitch and pin order as the board header, or a lead long enough to re-terminate (Connectors).

Reading a cell code

Pouch cells are named by size: two digits of thickness, two of width, two of length, in millimeters, with the thickness in tenths below 10 mm. So 301217 is 3.0 x 12 x 17 mm, 364046 is 3.6 x 40 x 46 mm and 801630 is 8.0 x 16 x 30 mm, while 102030 is 10 x 20 x 30 mm INFERRED (industry naming, matched against the photos below). Makers round and differ on whether the length includes the protection board, so treat the code as a guide and measure.

Keyboard half: FH301217

Each half carries one small cell that keeps it running while you swap a module; it "is not intended to power normal operation" and charges while the half draws power DOC⁴⁵.

Label side on a millimeter rule, with the red, white and black lead and the white 3-way plug. CRL IP2 p13 (crop).

Label close-up: "- FH301217 3.7V / + 50mAh 0.185Wh". CRL IP2 p14 (the same photo is in CRR IP1 p11).

Back of the cell: the protection board is folded at the lead end under yellow tape. CRL IP2 p13 (crop).

The 3-way plug: a ribbed front and side protrusions, like a JST SH housing. CRL IP2 p13 (enlarged crop).

Property	Value	Evidence
Label	- FH301217 3.7V / + 50mAh 0.185Wh; no date code	DOC CRL IP2 p13-p14; CRR IP1 p10-p1112
Test reports	"Power Source 1# Supplied from battery. Model: 301217", "DC 3.7V 50mAh 0.185Wh"	DOC CRL BLE p10; CRR BLE p1012
Chemistry	lithium polymer pouch (the manual says "Lithium Ion")	DOC INFERRED (pouch form)4
Voltage	3.7 V nominal, 4.2 V full charge	DOC (label) INFERRED (4.2 V)
Capacity, energy	50 mAh, 0.185 Wh (the v1.0.6 spec sheet's "45mA" is a typo or a minimum)	DOC INFERRED
Size	3.0 x 12 x 17 mm by its code; on the rule about 12.5 mm wide and 18.5 mm long including the folded protection board (within about 0.5 mm); thickness not measurable from the photos	INFERRED (code, measured on the photo)
Protection	a protection board folded at the lead end under yellow tape; no marking legible	DOC INFERRED (function)
Lead	3 wires, red, white, black, about 20-25 mm long (estimated on the photo); at the plug the white wire sits in the middle	DOC INFERRED (order, from the photo)
Plug	white 3-way housing about 5.5 mm across its side protrusions and 3.5 mm across the body, with a ribbed front: a close match for JST SH SHR-03V-S (6.0 and 4.0 mm, 1.0 mm pitch) within the photo's precision; the rib spacing reads 0.8-0.9 mm on the photos, so 1.0 mm is likely but not proven	DOC INFERRED13
Board side	a receptacle on the mainboard beside pads VBAT2, NTC and (probably) MZ_VBAT_2; its pin count is not resolved	DOC CRL IP1 p91 (details)
Thermistor	the white wire is most likely a thermistor (the NTC pad); the half's charger is not identified, so its expected value is unknown	INFERRED (details)

Fit criteria. Thickness at most 3.0 mm; width at most about 12.5 mm; length at most about 18.5 mm including the protection board, unless the space around the cell proves longer (details); a PCM; a three-wire lead with a thermistor (10 kΩ unless the half's charger turns out to need another value); a 3-way JST SH-class plug with the board's pin order; 50 mAh or more if it fits.

Where to buy (listings read on 2026-09-23; prices and stock change; nothing bought or tested). No listing for FH301217 or any 301217 cell turned up at manufacturers, distributors, marketplaces or battery shops, and the size code alone is not in the catalogs we checked.

Rank	Option	Size (mm)	Capacity	As sold	PCM / NTC	Price, minimum	Fit and what to adapt	Evidence
1	YDL Battery 301215	3.0 x 12 x 17, including the PCM	30 mAh, rated 0.2C standard, 0.5C maximum	JST PH 2.0 2-pin, 50 mm leads; options for a JST SH 1.0 plug and other series	PCM yes; NTC option (+$0.50, "connector changes to 3-pin"), value not stated	$2.00 each, volume from $1.20; minimum order stated as 10	The only stocked cell with the original's exact envelope. Order the SH 1.0 plug with the NTC option, ask for a 10 kΩ NTC, then check the pin order. 60 % of the original capacity: at 0.5C it tolerates 15 mA of charge, and the half's charge current is unknown (details); watch the first charges	REPORTED listing
2	LiPol Battery LP281221 (catalog size)	2.8 x 12 x 21	60 mAh	made to order; the maker's product pages offer a PCM, a 10 kΩ NTC, wire lengths and connectors	on request	quote only; its product pages state samples from 5 pieces	More capacity and 0.2 mm thinner, but about 2.5 mm longer than the original with its fold: use only if the space in the half is measured and has the room	REPORTED catalog table
3	LiPol Battery LP301218 (catalog size)	3.0 x 12 x 18	30 mAh	made to order, as above	on request	quote only	Same envelope and caveat as rank 1, from a second maker	REPORTED catalog table
4	A custom 3.0 x 12 x 17 mm, 50 mAh cell with PCM, 10 kΩ NTC and a 3-way SH plug	as the original	50 mAh	-	-	quote; both makers above advertise custom cells	The only way to match the original exactly	INFERRED

Two-wire 301215 cells are also sold on marketplaces; without a thermistor they are not recommended (see What every replacement must match).

Tune: FH 202030

The Tune's pack is the only block pack in the set: a wrapped brick rather than a flat pouch.

Label side on the tape (centimeters on the lower scale): about 34 x 20 mm. CRL IP4 p25 (crop).

The same pack turned over: the block is thick, consistent with a roughly square section of about 20 mm. CRL IP4 p25 (crop).

"+ FH 202030 3.7V / 1000mAh 3.7Wh / - 20250603". CRL IP4 p26 (the same photos are in CRR IP4 p22-p23).

The 3-way plug: contacts about 1.5 mm apart in a housing about 6 mm wide, like JST ZH. CRL IP4 p26 (crop).

In place: base cover off, Qi coil lifted, the pack beside the ring board with its lead to the inner island. A 2D code is blurred. CRL IP2 p18 (crop).

Property	Value	Evidence
Label	+ FH 202030 3.7V / 1000mAh 3.7Wh / - 20250603	DOC CRL IP4 p25-p26 = CRR IP4 p22-p231
Chemistry, build	3.7 V lithium polymer (or lithium-ion) cells in a blue PVC heat-shrink block; the cells are not visible	DOC INFERRED
Voltage	3.7 V nominal, 4.2 V full charge	DOC INFERRED
Capacity, energy	1000 mAh, 3.7 Wh on the filed sample; the website, the 2023 campaign and the v1.1.0 manual say 1500 mAh, and a 2024 update says the Tune was redesigned to fit a larger battery	DOC6910 (details)
Size	code 202030 read as 20 x 20 x 30 mm (the tenths reading, 2.0 x 20 x 30 mm, gives about 110-140 mAh in makers' catalogs, far short of 1000 mAh); the label face measures about 34 x 20 mm on the tape; thickness not measured	DOC INFERRED16
Probable build	two 10 x 20 x 30 mm cells in parallel under one wrap: 102030 cells are sold at 500-600 mAh each, which matches 1000 mAh and 20 mm; one thick cell is also possible	INFERRED REPORTED (the 102030 listings below) (details)
Protection	none visible outside the wrap	DOC
Lead	3 wires, red, white, black, about 35-40 mm long (estimated on the photo), twisted at the plug	DOC INFERRED (length)
Plug	white 3-way housing about 6.0 mm wide with contacts about 1.5 mm apart: JST ZH class (ZHR-3 is 6.0 mm wide, 1.5 mm pitch)	DOC INFERRED14
Board side	a white wire-to-board header on the ring board's inner island (J6, contact count not resolved)	DOC CRL IP3 p191
Thermistor	the board has an NTC pad and RT1/RT2 beside the SGM41523 charger, whose datasheet recommends a 103AT-2 (10 kΩ) thermistor	DOC INFERRED12

Fit criteria. A pack no larger than about 20 x 21 x 34 mm including its wrap and protection board; a PCM; a 10 kΩ NTC on the third wire; a JST ZH 1.5 mm 3-way plug with the board's pin order; 1000 mAh or more.

Where to buy (listings read on 2026-09-23; nothing bought or tested). No listing for FH 202030, or any 1000 mAh pack of this size, was found.

Rank	Option	Size (mm)	Capacity	As sold	PCM / NTC	Price, minimum	Fit and what to adapt	Evidence
1	Two LiPol Battery LP902030 in parallel, ordered as one 1S2P pack	each 9.0 x 20 x 30; the pair about 18 x 20 x 30	2 x 500 mAh = 1000 mAh; each 250 mA maximum charge, 500 mA continuous discharge	wires; the page offers a 10 kΩ NTC, wire lengths and connectors	PCM yes; NTC on request	price not shown; samples from 5 pieces	Matches the original capacity and fits the envelope. Ask the maker to build the pair as one pack with one 10 kΩ NTC and a ZH 1.5 mm 3-way plug (the maker lists assembled 2P packs with an NTC, for example its LP351624 2P)	REPORTED listing
2	Two YDL Battery 102030 in parallel	each 10 x 20 x 32 including the PCM	2 x 600 mAh = 1200 mAh; 0.5C maximum	JST PH 2.0 2-pin; options for a JST ZH 1.5 plug and an NTC (3-pin)	PCM yes; NTC option	$3.73 each; minimum order stated as 10	More capacity; about 2 mm longer than the code, likely within the 34 mm wrapped length (details). Two separately protected cells must be joined in parallel at equal voltage (see the Track section), with one NTC on the lead: an advanced job	REPORTED listing
3	One YDL 102030 alone	10 x 20 x 32	600 mAh	as above	as above	as above	Fits with room to spare, but 60 % of the capacity, and at 0.5C it tolerates 300 mA while the Tune may charge at up to about 0.5 A. Not recommended until the Tune's charge current is known (details)	REPORTED INFERRED

Touch: FH364046

The Touch holds one flat cell in a molded recess under two flex cables.

The cell on the tape (centimeters on the lower scale): about 40 x 45 mm including the taped protection fold. CRL IP5 p33 (crop).

"- FH364046 3.7V / 700mAh 2.59Wh / + 20250611"; the protection board under the tape at left. A hand mark on the tape is blurred. CRL IP5 p34.

A second sample: "FH364045 3.7V 700mAh 2.59WH 20241201", from the teardown layout. CRL IP4 p28 (crop).

The 3-way plug, about 4 mm across the body. CRL IP5 p33 (enlarged crop).

In place: one cell in its recess, two flex cables over it, the lead to the pogo-board side. 2D codes are blurred. CRL IP4 p28 (crop).

Property	Value	Evidence
Labels	- FH364046 3.7V / 700mAh 2.59Wh / + 20250611 (CRL IP5 p34); a second sample FH364045, same rating, 20241201 (CRL IP4 p28); a third photo on CRL IP5 p33 reads FH364046 with a date ending 0250519	DOC1
How many cells	one in the opened Touch; the different dates suggest several sample cells were photographed, not two per module	DOC INFERRED (details)
Chemistry	lithium polymer pouch	INFERRED (pouch form)
Voltage	3.7 V nominal, 4.2 V full charge	DOC INFERRED
Capacity, energy	700 mAh, 2.59 Wh on the filed samples; the website and 2023 campaign said 800 mAh, the v1.1.0 manual 1500 mAh	DOC79 (details)
Size	3.6 x 40 x 46 mm by its code (364045: 3.6 x 40 x 45 mm); on the tape about 40 x 45 mm including the protection fold; the lower-resolution ruler photo on the same page reads about 40 x 44 mm for the body and up to 49 mm with the fold	DOC INFERRED (measured on the photos)
Protection	a protection board folded along one short edge under yellow tape; no marking legible	DOC INFERRED (function)
Lead	3 wires, red, black, white, about 40-45 mm long (estimated on the photo); the order at the plug is not legible	DOC INFERRED (length)
Plug	white 3-way housing, about 4 mm across the body, contacts about 1.0 mm apart: JST SH class	DOC INFERRED13
Board side	J3, a 3-position right-angle header with two hold-down tabs, about 1.0 mm pitch, beside VBAT and NTC pads and a 5 V TVS diode	DOC CRL IP5 p311 (parts TCM-22)
Thermistor	NTC pad and RT1-RT3 beside the SGM41523 charger: a 10 kΩ 103AT-type NTC expected	DOC INFERRED12

Fit criteria. Thickness at most 3.6 mm; width at most 40 mm; length at most about 45 mm including the protection board, unless the recess proves longer (details); a PCM; a 10 kΩ NTC; a JST SH 1.0 mm 3-way plug with the J3 pin order; 700 mAh if you can get it.

Where to buy (listings read on 2026-09-23; nothing bought or tested). No listing for FH364046, FH364045 or any 364046/364045 cell was found, and no stocked cell reaches 700 mAh within 3.6 x 40 x 46 mm.

Rank	Option	Size (mm)	Capacity	As sold	PCM / NTC	Price, minimum	Fit and what to adapt	Evidence
1	LiPol Battery LP304045 (catalog size)	3.0 x 40 x 45	500 mAh	made to order; PCM, 10 kΩ NTC, wires and connectors offered on the maker's product pages	on request	quote only; samples from 5 pieces	Fits every known dimension and is 0.6 mm thinner. 71 % of the capacity, so the charge-rate caveat applies (details). Order with a 10 kΩ NTC and an SH 1.0 mm 3-way plug	REPORTED catalog table
2	LiPol Battery LP353045	3.5 x 30 x 45	480 mAh, 1.776 Wh	50 mm wires	PCM yes; NTC "No" as listed	price not shown	Fits, 10 mm narrower than the recess (pad it so it cannot move). Needs a thermistor added by the maker and a plug	REPORTED listing
3	A custom 3.6 x 40 x 46 mm, 700 mAh cell with PCM, 10 kΩ NTC and SH plug	as the original	700 mAh	-	-	quote	The only way to keep the original runtime and charge rate	INFERRED
Not recommended	LiPol Battery LP384046 (catalog size)	3.8 x 40 x 46	840 mAh	made to order	on request	quote only	0.2 mm thicker than the original. Only if the recess depth is measured and has the room	REPORTED catalog table

Track: QS801630 1S2P

The Track's pack is two small cells wired in parallel and joined at an angle so the pack follows the ring around the ball.

The pack, with the print on one cell: "QS801630 300mAh ... 3.7V 1.11Wh". The lead is red, yellow and black. CRL IP7 p42 (crop).

The pack label: "QS801630 1S2P 600mAh / 25H09 3.7V 2.22Wh" (rotated to read upright). CRL IP7 p42 (crop).

A second pack: "QS801630 1S2P / 600mAh / 25G24 3.7V 2.22Wh". CRL IP7 p43.

The 3-way plug; the yellow wire enters in the middle. CRL IP7 p42 (enlarged crop).

In place: one cell along the right side, one along the bottom, joined at the corner; the Qi coil flipped out. 2D codes and a lab mark are blurred. CRL IP6 p38 (crop).

Property	Value	Evidence
Labels	pack QS801630 1S2P 600mAh / 25H09 3.7V 2.22Wh (CRL IP7 p42) and QS801630 1S2P / 600mAh / 25G24 3.7V 2.22Wh (p43, a second pack); each cell printed QS801630 300mAh / …5H09 3.7V 1.11Wh	DOC1
Build	two pouch cells in parallel (1S2P), wrapped in yellow polyimide tape, joined with nickel tabs at an angle; in the module one lies along the side, one along the bottom	DOC CRL IP6 p38; CRL IP7 p421
Chemistry	lithium polymer pouch	INFERRED
Voltage	3.7 V nominal, 4.2 V full charge	DOC INFERRED
Capacity, energy	600 mAh, 2.22 Wh (2 x 300 mAh, 2 x 1.11 Wh) on the filed samples; the website and 2023 campaign said 800 mAh, the v1.1.0 manual 700 mAh	DOC89 (details)
Size	each cell 8.0 x 16 x 30 mm by its code; on the tape each cell's face is about 16-17 mm wide, and the ends are hidden under the joint tape; 801630 cells are sold at 300 mAh, which matches	DOC INFERRED REPORTED (Vats listing below)
Protection	none visible outside the wrap; probably inside the joint	DOC INFERRED
Lead	3 wires, red, yellow, black, about 35-40 mm long (estimated on the photo); yellow enters the plug in the middle	DOC INFERRED (order, from the photo)
Plug	white 3-way housing, about 4.5 mm across the body and 6.5 mm across its side protrusions: JST SH class like the half's, within the photo's precision	DOC INFERRED13
Board side	a white 3-pin connector; not identified on the board photos	DOC (parts TKX-17)
Thermistor	NTC pad on the ring board and an SGM41523 charger: a 10 kΩ 103AT-type NTC expected	DOC INFERRED12

Fit criteria. Each cell at most 8.0 x 16 x 30 mm, including its protection board if it has one; the two joined at the original angle so the pack lies in the same two pockets (details); a PCM per cell or one for the pack; a 10 kΩ NTC; a JST SH-class 3-way plug with the board's pin order; 600 mAh or more in total.

Where to buy (listings read on 2026-09-23; nothing bought or tested). No listing for QS801630 was found; 801630 is a standard size and single cells are sold, but no ready-made angled 1S2P pack.

Rank	Option	Size (mm)	Capacity	As sold	PCM / NTC	Price, minimum	Fit and what to adapt	Evidence
1	Two LiPol Battery LP801530, ordered as one angled 1S2P pack	each 8.0 x 15 x 30	2 x 300 mAh = 600 mAh; each 150 mA maximum charge, 300 mA continuous discharge	wires; the page offers a 10 kΩ NTC, wire lengths and connectors	PCM yes; NTC on request	price not shown; samples from 5 pieces	Matches the original capacity; 1 mm narrower. Ask for the two cells joined at the original angle with one 10 kΩ NTC and an SH 1.0 mm 3-way plug	REPORTED listing
2	Two Shenzhen Vats Power Source 801630	each 8.0 x 16 x 30 (tolerance ±0.2 x ±0.5 x ±3)	300 mAh each	"JST or Molex connectors can be selected"	PCM yes (overcharge, overdischarge, overcurrent, short circuit); NTC not stated	$1.48 each at 10-999; no minimum if in stock	The original's own size code. The length tolerance is wide: measure the cells you receive. Needs the same pack assembly and a thermistor	REPORTED listing
3	Two YDL Battery 801530	each 8 x 15 x 32, including the PCM	350 mAh each, 0.5C maximum	JST PH 2.0 2-pin; SH 1.0 and ZH 1.5 plug options; NTC option	PCM yes; NTC option	$3.47 each; minimum order stated as 10	More capacity, but 2 mm longer than the code: fit in the pockets is unmeasured	REPORTED listing

Building a two-cell pack yourself

Joining two cells in parallel is for people who solder battery tabs routinely. Use two cells of the same make, model, capacity and age; bring both to the same voltage (within about 0.01 V) before joining them, because two cells at different voltages dump current into each other the moment they touch; protect each cell with its own PCM or the pack with one PCM rated for both; fit one thermistor against a cell; insulate every joint with polyimide tape. Battery University's guidance on parallel packs: use "the same battery type with equal voltage and capacity (Ah) and never ... mix different makes and sizes", and a shorted cell in a parallel pack "could cause excessive heat and become a fire hazard" DOC¹⁷. Never solder directly to a cell's tabs with a hot iron held long; a pack maker can spot-weld the tabs instead. Untested by us.

Connectors and re-terminating a lead

Most replacement cells arrive with a JST PH 2.0 mm 2-pin plug or bare wires, so you will usually move the lead to a matching 3-way housing, or order the cell with the right plug. The series below are the likely matches; confirm yours by measuring (details).

Battery	Likely series	Housing and contacts	Width across the housing	Evidence
Half, Touch, Track	JST SH, 1.0 mm pitch	SHR-03V-S (with side protrusions) or SHR-03V-S-B (without); contact SSH-003T-P0.2	6.0 mm with protrusions, 4.0 mm without	DOC13 (catalog); INFERRED (match)
Tune	JST ZH, 1.5 mm pitch	ZHR-3; contact SZH-002T-P0.5 or SZH-003T-P0.5	6.0 mm	DOC14 (catalog); INFERRED (match)
If a plug measures 1.25 mm	JST GH or Molex PicoBlade class	GHR-03V-S (JST GH)	5.0 mm	DOC15

Ready-made leads (listings read on 2026-09-23): a JST SH 1.0 mm 3-pin cable (Adafruit 5765, 100 mm, $1.50, with socket headers on the far end to cut off) and a 1.25 mm 3-pin matching cable pair (Adafruit 4721, PicoBlade-compatible, 40 cm, $0.95) REPORTED. Their wire colors follow the seller's own convention, not a battery's: map every wire with a meter. The crimp contacts are too small to crimp well without the maker's tool, so a pre-crimped lead spliced to the cell's wires (soldered, then covered in heat-shrink, one joint at a time so two bare wires never touch) is the practical route INFERRED.

Measurements that would confirm fit

Nobody has published these numbers yet. If you open a half or a module, these are the measurements that turn the estimates on this page into facts; each is an open question.

• OPEN The half cell's thickness, width and length, with and without the protection fold, and the free length and depth of the space it sits in (OQ.H42).
• OPEN Each plug's series and pitch: calipers across the housing (6.0 mm points to JST SH with protrusions or ZH, 5.0 mm to GH, 4.0 mm to SH without protrusions) and between contact centers (OQ.H43).
• OPEN Each lead's wire order at the plug, and the polarity read with a meter; which board pin is positive (OQ.H44, OQ.H04 for the half).
• OPEN The thermistor's resistance from the third wire to the negative wire at room temperature, with the temperature noted (about 10 kΩ at 25 °C for a 103AT type) (OQ.H44).
• OPEN Whether each pack has a protection board, and its IC markings (OQ.H45).
• OPEN The Tune pack's thickness and whether it holds one cell or two (OQ.H46).
• OPEN The Touch recess and the Track pockets: the largest cell each holds, the Track's bend angle and lead length (OQ.H47).
• OPEN The charge settings: the resistors on each module charger's CC and CV pins, and the half's charger part (OQ.H48).
• OPEN The label on your own retail pack, since retail capacities may differ from the filed samples (OQ.H21).

Replacement procedure

This is as far as the evidence goes. Nobody on this project has replaced a Create battery, so every step below is untested; how each case is fastened is only partly visible in the FCC photos.

Before you start

Unplug USB, undock both modules, and switch the half off. Have the replacement's polarity and thermistor already measured (above). Keep the old battery until the new one works.

Keyboard half (untested). The only description is the v1.0.6 manual's end-of-life procedure: remove the switches, screws and hinges, take the circuit board out of the aluminum body, then detach the battery from the circuit board DOC⁴. The label artwork shows 12 screws on each half's underside DOC². The cell plugs into a receptacle on the mainboard beside the VBAT2 and NTC pads DOC¹; no photo shows where the cell lies in the assembled half or how it is held (details). Unplug it by the housing, never by the wires. The keymap and pairings live in flash, so a cell swap should not erase them INFERRED, untested.

Tune (untested). The photos show the base cover off (it carries six metal blocks), the Qi coil lifted on its fine wires, and the pack lying beside the ring board with its lead running to a white header on the inner island (CRL IP2 p18) DOC¹. How the base is held (screws, clips or adhesive) is not visible. Do not pull on the Qi coil's wires.

Touch (untested). The Touch opens into two shells: the main board sits in one, and the cell lies in a molded recess in the other, under two flex cables, with its lead running to J3 on the main board past the pogo board (CRL IP4 p28) DOC¹. Free the flex cables before lifting the cell, and do not pry under the cell with metal.

Track (untested). The photos show the base cover off (it carries six metal inserts) and the Qi coil flipped out on its wires, exposing the two cells in pockets along the ring, joined at the corner, with the lead running to a white 3-pin connector near the pogo board (CRL IP6 p38) DOC¹. The cells may be held with tape or adhesive; do not lever them out.

After fitting. Charge on USB with the half or module where you can watch it, and check the voltage climbs and settles near 4.2 V. The half's own cell reads as "Internal Battery Voltage (mV)" in NayaFlow, and a docked module's cell through the module battery reading; both are described on Power and batteries.

Reading battery voltages is read-only

The voltage reads (fe/1006 for the half's cell, de/100b for a docked module's cell, in mV) change nothing on the keyboard. Tested by us on 3.41.0 with modules on 2.3.3; see Power and batteries.

Open questions

• OPEN The cell makers behind the FH and QS prefixes; none of the catalogs we checked (LiPol Battery, YDL, Shenzhen Data Power, EEMB, PKCELL) uses them, so they may be the pack assembler's or Naya's own codes INFERRED (details).
• OPEN Retail pack capacities (details) and one or two cells per Touch (details).
• OPEN The half cell's size and cavity (details), and its connector and pin order (details).
• OPEN Connector series and pitch for all four batteries (details).
• OPEN Wire order and thermistor value (details); protection boards (details).
• OPEN The Tune pack's thickness and build (details); the Touch and Track battery spaces (details).
• OPEN Charge voltage and current on each board (details); the half's power tree (details).

See also: Power and batteries, The keyboard half, Tune, Touch, Track, Module dock and the Parts list.

Sources

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1. FCC ID 2BQ4V0825CRL (left half; the module photos are in both filings): internal photos 1-7 and test reports, on the FCC record (FCC EAS search, grantee 2BQ4V; mirror fccid.io/2BQ4V0825CRL). Page codes such as CRL IP2 p13 are explained on Regulatory records. The images on this page are crops of these exhibits, with 2D codes and a hand mark blurred. ↩↩↩↩↩↩↩↩↩↩↩↩↩↩

2. FCC ID 2BQ4V0825CRR (right half): internal photos, test reports and the label artwork; mirror fccid.io/2BQ4V0825CRR. ↩↩↩↩

3. FCC ID 2BQ4V0825DG (dongle); mirror fccid.io/2BQ4V0825DG. ↩

4. Naya Create User Manual Version 1.0.6, FCC ID 2BQ4V0825CRR user manual exhibits (fccid.io): spec sheet (p3), power (p4), safety and end-of-life battery removal (part 4, p3); see Manuals. ↩↩↩↩↩↩

5. Naya Create User Manual Version 1.1.0 (vendor PDF, 2025-11-10), p4, p11; see Manuals. ↩↩↩

6. Naya Tune User Manual Version 1.1.0 (vendor PDF), p2. ↩

7. Naya Touch User Manual Version 1.1.0 (vendor PDF), p2. ↩

8. Naya Track User Manual Version 1.1.0 (vendor PDF), p2. ↩

9. Kickstarter campaign page with its Specs Sheet, naya-create/naya-create (2023). ↩↩↩

10. Kickstarter update 15, 2024-09-03. ↩

11. Kickstarter update 21, 2025-06-16. ↩

12. SG Micro, SGM41523/SGM41523A/B/C/D datasheet, product page: TS pin and 103AT-2 thermistor, JEITA thresholds (0, 10, 45, 60 °C), charge voltage selection (4.2 V when CV is grounded or open), charge current ICHGREG = K·VREF/RCC with K = 10 300 and VREF = 1 V. The part is identified on the module boards on Tune, Touch and Track. ↩↩↩↩↩↩

13. JST, SH connector catalog, eSH.pdf: housing SHR-03V-S (A 2.0 mm; B 6.0 mm with protrusions, 4.0 mm without), contact SSH-003T-P0.2. ↩↩↩↩

14. JST, ZH connector catalog, eZH.pdf: housing ZHR-3 (A 3.0 mm, B 6.0 mm), contacts SZH-002T-P0.5, SZH-003T-P0.5. ↩↩

15. JST, GH connector catalog, eGH.pdf: housing GHR-03V-S (A 2.50 mm, B 5.00 mm). ↩

16. LiPol Battery, 3.7 V Li-polymer batteries by thickness (catalog table, read 2026-09-23): for example LP252030 (2.5 x 20 x 30 mm) at 110 mAh and LP302030 (3.0 x 20 x 30 mm) at 140 mAh. ↩

17. Battery University, BU-302: Series and Parallel Battery Configurations. ↩