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701250 3.7V 400mAh LiPo Battery
$0.72
701250 3.7V 400mAh LiPo battery, pencil-thin 7mm cell for smart ring chargers, hearing aids and mini wireless earbud cases. CE/RoHS/UN38.3 certified.
701250 3.7V 400mAh LiPo battery from HNF Battery (model 701250) is engineered for compact, reliable power in a slim footprint. This pack pairs dependable PCM protection with consistent capacity, making it a trusted choice for OEM integrators worldwide.
The HNF-701250 is a slim 7mm lithium polymer battery delivering 400mAh at 3.7V in an extremely narrow 12 x 50mm strip. Its pencil-thin width is ideal for the slimmest battery compartments — smart ring chargers, compact hearing aids, mini wireless earbud cases, and micro medical implants. With 180mΩ impedance and PCM protection, it offers reliable power where space is at the absolute minimum.
Model number: HNF-701250 400mAh 3.7V
Nominal voltage: 3.7 V
Nominal capacity: 400 mAh
Dimension: 7.0 x 12 x 50 mm
Cell configuration: 1S1P
Certification: CE / RoHS / IEC62133 / UN38.3 / MSDS
Warranty: 12 months
Specifications
| Item | Rating | Remark |
|---|---|---|
| Model | HNF-701250 400mAh 3.7V | |
| Nominal Capacity | 400 mAh | Standard discharge (0.2C5A) after standard charge |
| Nominal Voltage | 3.7 V | |
| Dimension | 7.0 x 12 x 50 mm | |
| Weight | Approx: 7 g | |
| Cut-off Charge Voltage | 4.2 V | |
| Cut-off Discharge Voltage | 3.0 V | |
| Initial Impedance | ≤ 180 mΩ | |
| Standard Charge | 0.2C CC charge to CV then CV till current ≤0.01C | Charge time: approx. 7.0 h |
| Standard Discharge | Discharge at 0.2C5A to cut-off voltage | |
| Cycle Life | ≥500 cycles, 80% capacity retention | |
| Operating Temperature | Charge 0~+45℃ / Discharge -20~+60℃ | |
| Storage Temperature | -10~+45℃ | |
| Storage Humidity | 45-75% RH |
Application Field
Smart ring charging cases, compact hearing aids, mini wireless earbud charging cases, micro medical implantable devices, ultra-compact IoT beacons.
Main Advantages
- High energy density, stable 3.7V nominal voltage
- High-drain capable, stable discharge performance
- Lightweight and ultra-thin; dimensions customizable on request
- Extremely safe, low self-discharge, long cycle life (≥500 cycles, 80% capacity retention)
- Reliable PCM protection against over-charge and over-discharge
- Wide operating temperature: -20℃ ~ +60℃
FAQ
Q: Do you accept customization?
A: Yes. We are a professional custom lithium battery manufacturer. Share your required voltage, capacity, and dimensions.
Q: Can this be shipped by air?
A: 1.48 Wh — well within the 100Wh limit, suitable for air freight with MSDS & UN38.3 documentation.
Q: Do you offer samples?
A: Samples are available; sample cost is refunded once a bulk order is confirmed.
Q: What is the MOQ?
A: In-stock items have no MOQ. For customized cells, MOQ is typically 3,000-10,000 pcs depending on size and capacity.
Q: How is quality assured?
A: Multi-stage quality control across R&D, incoming inspection, production, pre-shipment, and after-sales, fully certified with CE, RoHS, and IEC62133.
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