Adafruit 1578, 500 mAh LiPo battery

Adafruit product 1578 is a protected single-cell lithium-ion polymer pouch battery, nominally 3.7 V and 500 mAh, with preattached red/black leads and a JST-PH-compatible two-pin plug. It includes protection circuitry. Use a suitable single-cell Li-ion CC/CV charger within the manufacturer's limits. Polarity: red (+) is on JST circuit 1 and black (-) on circuit 2. Looking at the plug's mating face with the latch bump up, red is on the right. This matches Adafruit and SparkFun boards; many other sellers wire the plug the opposite way, so check any pack with a meter before plugging it in.

Manufacturer references and dimensions

Adafruit product page specifies 29 × 36 × 4.75 mm, 10.5 g and 102 mm power leads. Its linked PKCELL drawing, QA.S.0228 edition A dated 2014-08-21, page 5, instead specifies 30 ±0.1 × 35 ±0.1 × 5 ±0.1 mm, 100 mm UL1007 AWG24 leads and a reversed JST PH-2P plug. The listing also records a June 2022 sideways-taped lead change. These revisions must not be treated as an identical dimensioned pack.

CAD status and downloads

The STEP and GLB are an Adom-authored mechanical reconstruction, derived from that drawing and Adafruit's photograph, not official manufacturer CAD. Silver pouch, folded seal flap, PCM, protection IC, amber tape, insulated leads and white plug are separate named solids. Small PCM and plug details are photo estimates. A conservative 30.1 × 36 × 5.1 mm pack envelope is used to accommodate the conflicting references. Wire insulation OD 1.3 mm is provisional.

The supplied curved 102 mm leads represent one installation pose. Their curvature does not define an intrinsic battery specification. Preserve terminal polarity and check the actual received revision before use. The project route and fit report are provided separately in the consuming Ghost Hand project.

Files: adom-1578.step, adom-1578.glb, provenance.json and docs/Datasheet.pdf. The photograph is linked above, not redistributed. No PCB footprint or electrical symbol is claimed by this mechanical-only component record.

Original CAD and prose: MIT. Manufacturer drawing and photograph retain their original rights and attribution.

Buy

Mouser 485-1578: USD 7.95 each, 435 in stock (checked 2026-11-07). Also Adafruit and DigiKey 1528-1841-ND.