803040 3.7V 400mAh LiPo Battery for IoT Sensors & Toys

The HNF-803040 is an 8mm-thin lithium polymer battery with a lower 400mAh capacity at 3.7V in the standard 30 x 40mm form factor. This reduced-capacity variant offers a cost-effective solution for simpler battery-powered devices like electronic toys, basic remote controls, wireless doorbells, and low-drain IoT sensors where full 1000mAh capacity is not required. Compact and PCM-protected for everyday safety.

Model number: HNF-803040 400mAh 3.7V
Nominal voltage: 3.7 V
Nominal capacity: 400 mAh
Dimension: 8.0 x 30 x 40 mm
Cell configuration: 1S1P
Certification: CE / RoHS / IEC62133 / UN38.3 / MSDS
Warranty: 12 months

Specifications

Application Field

Electronic toys and interactive games, basic TV remote controls, wireless doorbell receivers, low-drain IoT sensor modules, children’s light-up shoes and accessories.

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.