Polymer Li-Ion 3.7V 220mAh Single Cell Battery 25x14x5mm
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Prices updated: 14 Oct 2026
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About this product
Single-cell polymer Li-ion battery rated 3.7 V and 220 mAh, measuring 25 x 14 x 5 mm. Its small flat size suits compact wearables, small sensors and tiny DIY boards with low power needs. Charge it with a Li-ion/LiPo charger that stops at 4.2 V.
Specifications
- Chemistry
- Li-ion polymer
- Nominal voltage
- 3.7 V
- Capacity
- 220 mAh
- Dimensions
- 25 x 14 x 5 mm
Frequently asked questions
Can I use this cell in a wearable or sensor project?
Yes, its small flat size suits compact wearables and sensor nodes. Pair it with a board that handles charging and protection, and keep the average current draw low to get reasonable runtime.
How should I charge it?
Use a single-cell Li-ion/LiPo charger that stops at 4.2 V, and use a charge current suited to this small capacity. Do not charge it with a NiMH or alkaline charger.
