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351626 3.8V 140mAh LiPo Battery
$1.02
351626 3.8V 140mAh LiPo battery, high-voltage cell for wireless earbuds, fitness trackers and smart glasses. CE/RoHS/UN38.3 certified.
351626 3.8V 140mAh LiPo battery from HNF Battery (model 351626) 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-351626 is an ultra-thin 3.5mm high-voltage lithium polymer battery delivering 140mAh at 3.8V in a compact 16 x 26mm footprint. The elevated 3.8V nominal voltage provides higher energy density than standard 3.7V cells in the same form factor, making it ideal for slim wireless earbuds, compact fitness trackers, smart glasses, and other wearables that demand maximum energy in minimum space.
Model number: HNF-351626 140mAh 3.8V
Nominal voltage: 3.8 V
Nominal capacity: 140 mAh
Dimension: 3.5 x 16 x 26 mm
Cell configuration: 1S1P
Certification: CE / RoHS / IEC62133 / UN38.3 / MSDS
Warranty: 12 months
Specifications
| Item | Rating | Remark |
|---|---|---|
| Model | HNF-351626 140mAh 3.8V | |
| Nominal Capacity | 140 mAh | Standard discharge (0.2C5A) after standard charge |
| Nominal Voltage | 3.8 V | |
| Dimension | 3.5 x 16 x 26 mm | |
| Weight | Approx: 3 g | |
| Cut-off Charge Voltage | 4.35 V | |
| Cut-off Discharge Voltage | 3.0 V | |
| Initial Impedance | ≤ 280 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
Wireless earbuds and true wireless headsets, compact fitness trackers, smart glasses and AR wearables, mini medical sensors, compact IoT wearables.
Main Advantages
- High energy density, stable 3.8V 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: 0.53 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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