Polymer Li-Ion Single Cell Battery 3.7V 150mAh 401119
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Prices updated: 13 Oct 2026
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About this product
A small single-cell polymer lithium-ion battery rated 3.7 V and 150 mAh, measuring 11 x 19 x 4 mm with two wire leads. It is used in small wearables and compact DIY electronics projects. It must be charged with a Li-ion charger that stops at 4.2 V.
Specifications
- Nominal voltage
- 3.7 V
- Capacity
- 150 mAh
- Dimensions
- 11 x 19 x 4 mm
- Chemistry
- Li-ion polymer
- Leads
- 2 wire
Frequently asked questions
What charger and charge current should I use?
Use a single-cell Li-ion or LiPo charger with a 4.2 V full-charge limit. A charge current of about 0.5C to 1C (75 to 150 mA) is typical for a 150 mAh cell, so confirm the limit in the cell's datasheet.
Does this cell need protection?
Yes. Lithium polymer cells can be damaged or become unsafe with overcharge or over-discharge. Check the polarity of the two leads before connecting, and use a protection circuit or a board with cutoff protection.
