Product Introduction
The 400mAh Polymer Lithium Ion Battery is a lithium polymer battery for powering small electronic devices, available for bulk orders and customization.
Product Features
Stable Cycle Life
This polymer lithium battery can withstand over 500 charge-discharge cycles under standard operating conditions, with slow capacity decay over 2-3 years, reducing replacement frequency.
Slim and Lightweight Soft-Pack Structure
The 400mAh Polymer Lithium Ion Battery uses aluminum-plastic film encapsulation, making it thinner and lighter than steel-cased batteries, facilitating ultra-thin and irregularly shaped designs.
Multiple Safety Protections
The battery can integrate a PCM protection board to effectively control overcharge, over-discharge, and short circuits, ensuring stable power supply for devices during long-term use.
Stable Battery Life
The 400mAh Polymer Lithium Ion Battery can continuously power low-power devices for 8-24 hours, meeting daily usage needs.
Why We Are the Leading Manufacturer of 400mah Polymer Lithium Ion Battery
Advanced Production Equipment
Equipped with hundreds of high-precision automated machines, including winding machines, mixers, vacuum ovens, automatic slitting machines, and fully automated packaging equipment.
Diverse Product Lines
Offering TWS batteries, 30-90 series, fast charging, 1-3C series, and customized batteries to meet the needs of various end devices.
Wide Application Areas
Products are widely used in Bluetooth headsets, smart wearables, smart homes, smart healthcare, GPS, drones, small lighting, and many other fields.
Strict Quality Control
Comprehensive quality control throughout the entire process, including raw material selection, production process monitoring, 100% functional testing, multi-dimensional structural inspection, and pre-shipment aging testing, ensuring the safety and reliability of every battery.
Frequently Asked Questions
Q: Can I place a sample order? What is the sample delivery time?
A: Yes, sample delivery is 3–10 days, allowing for performance and quality testing.
Q: Can you produce with a customer's brand?
A: Yes, OEM/ODM customization is supported.
Q: What is the delivery time for bulk orders?
A: 2–7 days for in-stock items, approximately 25–30 days for mass production.
Q: Is the battery capacity accurate?
A: Yes, test data is provided; the actual capacity is usually higher than the nominal capacity.
Q: How is it shipped?
A: DHL/TNT/FedEx/UPS or your preferred freight forwarder. Photos of the packaging and tracking number will be provided.
Q: What is the working principle of a 400mAh Polymer Lithium Ion Battery?
A: A 400mAh Polymer Lithium Ion Battery stores and releases energy by moving lithium ions between the positive and negative electrodes.
Q: What applications commonly use this battery?
A: 400mAh Polymer Lithium Ion Batteries are commonly used in wearable devices, medical electronics, and portable smart products.
|
Charge voltage |
4.2V |
|
Nominal voltage |
3.7V |
|
Nominal capacity |
400mAh 0.5C Discharge |
|
Charge current |
Standard Charging：0.5C Rapid charge：2.0C |
|
Discharge current |
Standard discharging：0.5C Rapid discharging：1.0C |
|
Standard Charging method |
0.5C CC(constant current)charge to4.2V,then CV(constant voltage 4.2V)charge till charge current decline to ≤0.02C |
|
charging Time |
Standard Charging ：3.5 hours |
|
Standard discharge method |
1C CC(constant current)discharge to Min Discharge cut-off voltage(3.3) |
|
Operating temperature |
Charging ：0℃~45℃ Discharging ：-20℃~60℃ |
|
Storage temperature |
-20℃~ +50℃ |
|
Storage humidity |
45~65%RH |
| Dimension | Length:40±2mm(not including tabs) Width:20±0.2mm Thickness:52±0.2mm |
| Cycle time | ≥300times ≥300 |
|
Vibration Test |
After standard charge, fixed the cell to ibration table and subjected to vibration cycling that the frequency is to be varied at the rate of 1Hz per minute between 10Hz and 55Hz, the excursion of the vibration is 1.6mm.The cell shall be vibrated for 30 minutes per axis of XYZ axes. |
|
Free fall |
The battery to be fully charged with standard charging condition ,then fall from height of 1.0m and hit onto concrete ground 2 times |
|
Heating Test |
The temperature of the oven is to be raised at a rate of 5±2℃min. to a temperature of 130±2℃, and remains for 30 minutes at this temperature. |
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