Polymer Li-Ion 3.7V 3000mAh Single Cell Battery (357090)
Part number: 357090Batteries & Holders
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Prices updated: 13 Oct 2026
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About this product
A single-cell rechargeable polymer lithium-ion battery with a 3.7 V nominal voltage and 3000 mAh capacity, in a flat 90 × 70 mm pouch format with size code 357090. It is commonly used to power portable electronics and DIY projects that need a compact, high-capacity cell.
Specifications
- Chemistry
- Li-Ion polymer
- Nominal voltage
- 3.7 V
- Capacity
- 3000 mAh
- Dimensions
- 90 × 70 mm
- Size code
- 357090
Frequently asked questions
What charger should I use?
Use a single-cell Li-ion or LiPo charger that charges to 4.2 V using constant-current then constant-voltage (CC/CV) control.
Does it need a protection circuit?
A protection circuit is strongly recommended to guard against over-charge, over-discharge and short circuit. Avoid discharging the cell below about 3 V.
