Description

403035 400mAh Technical Information

Model: 403035 400mAh

Battery Type: Rechargeable Li-Polymer Battery

Nominal Capacity: 400mAh

Nominal Voltage: 3.7V

Nominal Energy: 1.48Wh

Protection Circuit Board (PCB): Built-in overcharge, over-discharge, over-current, short circuit protection

Charge Cut-off Voltage: 4.2V

Discharge Cut-off Voltage: Typically 3.0V, Minimum 2.75V

Standard Charge Current: 0.2C (80mA)

Max Charge Current: 1C (400mA)

Standard Discharge Current: 0.2C (80mA)

Max Continuous Discharge Current: 1C (400mA)

Max Peak Discharge Current: 2C (800mA)

Internal Resistance: Less than 200mΩ

Cycle Life: More Than 500 Times

Dimensions: 4 × 30 × 36 mm

Weight: 13g

Charge Temperature Range: 0°C to 45°C

Discharge Temperature Range: -20°C to 65°C

Storage Temperature Range:

• -20℃~25℃: More than 12 months
• -20℃~45℃: Less than 3 months
• -20℃~60 ℃: Less than 1 month

Connector: Bare wires or optional with JST, Molex etc

❓ Frequently Asked Questions (FAQ)

1. What devices are compatible with the 403035 400mAh 3.7V LiPo Battery?

This battery is suitable for a wide range of compact electronics, including:

• GPS trackers

• Smart wearables

• Medical monitoring devices

• Wireless earbuds and Bluetooth headsets

• Portable sensors and IoT modules

If your device requires a 3.7V lithium polymer battery with dimensions close to 4×30×36mm, this cell is likely a perfect match.

2. Can I customize the wire length and connector type?

Absolutely. We offer OEM/ODM services, including:

• Custom wire length and gauge

• JST, Molex, Hirose, or other connector types

• Specialized PCBs for different cutoff voltages or discharge rates
  Contact our sales team to discuss your application needs.

3. What certifications does this battery have?

All our lithium polymer batteries, including the 403035 400mAh 3.7V model, are shipped with:

• MSDS (Material Safety Data Sheet)

• UN38.3 (for safe air/sea transportation)

• RoHS compliance (environmental safety)
  Other certifications like PSE or IEC62133 can be provided for bulk orders.

4. How should I charge this lithium polymer battery?

Use a dedicated 3.7V LiPo battery charger with a charge voltage of 4.2V (±0.05V) and a recommended charge current of 0.2C to 0.5C. Overcharging or using incompatible chargers may damage the cell or reduce safety.

5. Is this battery safe to transport internationally?

Yes. The 403035 3.7V LiPo Battery with PCB is certified for safe international shipping and complies with IATA/UN38.3 standards. It is classified as UN3480 (Lithium Ion Batteries) and properly packaged according to air/sea freight requirements.

6. Can this battery be used in parallel or series configuration?

Yes, but only under the guidance of a qualified engineer. For multi-cell applications (series/parallel), balancing and custom PCM/BMS designs are critical. We also provide multi-cell pack design and assembly services upon request.

7. What is the lead time for bulk orders?

Lead time varies based on quantity and customization needs:

• Samples: 5–10 working days

• Bulk production: 10–20 working days
  Faster delivery can be arranged for urgent orders.

Model Name	Nominal Capacity	Thickness (±0.2mm)	Width (±0.5mm)	Length (±0.5mm)	Weight             (±5%)	Max Internal Resistance
353035	300mAh	3.5mm	30mm	35mm	9g	120mΩ
403035	380mAh	4.0mm	30mm	35mm	11.4g	100mΩ
403035	400mAh	4.0mm	30mm	35mm	12g	90mΩ
503035	500mAh	5.0mm	30mm	35mm	15g	80mΩ
553035	470mAh	5.5mm	30mm	35mm	14.1g	90mΩ
653035	700mAh	6.5mm	30mm	35mm	21g	80mΩ
753035	750mAh	7.5mm	30mm	35mm	22.5g	60mΩ
803035	1000mAh	8.0mm	30mm	35mm	30g	60mΩ
953035	1050mAh	9.5mm	30mm	35mm	31.5g	60mΩ
103035	1100mAh	10.0mm	30mm	35mm	33g	60mΩ