Rechargeable LiPo Battery Cell 402030 3.7V 220mAh
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Prices updated: 13 Oct 2026
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About this product
A compact rechargeable lithium polymer (LiPo) cell rated 3.7V and 220mAh. The 402030 code denotes an approximate size of 4 x 20 x 30 mm. It suits small portable projects and battery-powered sensor or gadget builds. Always charge it with a charger designed for single-cell Li-Po batteries.
Specifications
- Nominal voltage
- 3.7V
- Capacity
- 220mAh
- Chemistry
- Lithium polymer (LiPo)
- Rechargeable
- Yes
- Size code
- 402030
Frequently asked questions
Which charger should I use with this cell?
Use a single-cell LiPo charger that stops at 4.2V per cell, such as a TP4056-based module with protection. Charging with an unsuitable charger can damage the cell or create a fire risk.
Can I connect it directly to a 5V board?
No. The nominal voltage is 3.7V, so a 5V supply needs a regulator or boost converter matched to your load. Avoid discharging the cell below about 3V to preserve its life.
