551145 3.7V 250mAh LiPo Battery

The HNF-551145 is an ultra-narrow 5.5mm lithium polymer battery delivering 250mAh at 3.7V in an extremely slim 11 x 45mm strip. Its pencil-thin width makes it the ideal choice for the slimmest electronics — smart pens, slim styluses, compact laser pointers, mini flashlights, and narrow wearable bands where width is the most constrained dimension. PCM protection ensures safe charging and discharging in tight enclosures.

Model number: HNF-551145 250mAh 3.7V
Nominal voltage: 3.7 V
Nominal capacity: 250 mAh
Dimension: 5.5 x 11 x 45 mm
Cell configuration: 1S1P
Certification: CE / RoHS / IEC62133 / UN38.3 / MSDS
Warranty: 12 months

Specifications

Application Field

Smart pens and digital styluses, laser pointers and presentation tools, mini flashlights and keychain lights, narrow wearable wrist bands, compact wireless transmitters.

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: 0.93 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.