Li-Polymer Battery 3.7V 300mAh 401230P (30×12×4 mm)
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Prices updated: 13 Oct 2026
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About this product
The 401230P is a slim 3.7 V, 300 mAh Li-Polymer battery measuring 30×12×4 mm, with an integrated protection circuit module (PCM) and pre-tinned leads. Its thin profile suits wearables, sensors and compact electronics where space is limited.
Specifications
- Chemistry
- Li-Polymer
- Nominal voltage
- 3.7 V
- Capacity
- 300 mAh
- Dimensions
- 30×12×4 mm
- Protection
- Integrated PCM
- Leads
- Pre-tinned, solderable
Frequently asked questions
What charger should I use?
Use a single-cell Li-Po charger with a 4.2 V charge voltage, and choose a charge current suited to a 300 mAh cell. The integrated PCM protects against overcharge and over-discharge, but it is not a substitute for a proper charger.
Can I solder directly to the leads?
Yes, the leads are pre-tinned for soldering. Keep the soldering time short and use moderate heat to avoid damaging the cell or the PCM. Verify polarity before connecting the battery to a circuit.
