Product Introduction
The 300 mAh Bluetooth Battery is a small, rechargeable lithium battery available for bulk orders and customization, for use in Bluetooth headsets, smart bracelets, portable speakers, and other devices.
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Items |
Specifications |
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Batteries |
3.7v 300mah lipo battery |
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Charge voltage |
4.2V |
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Nominal voltage |
3.7V |
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Nominal capacity |
300mAh 0.2C Discharge |
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Charge current |
Standard Charging:0.5C Rapid charge: 1.0C |
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Standard Charging method |
0.5C CC (constant current) charge to 4.2V, then CV (constant voltage 4.2V) charge till charge current decline to ≤0.05C |
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Charging time |
Standard Charging: 2.75hours(Ref.) Rapid charge: 2hours(Ref.) |
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Max.charge current |
1.0C |
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Max.discharge current |
1.0C |
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Discharge cut-off voltage |
2.75V(0.2C) |
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Perating temperature |
ChCharging: 0 °C ~45 °C Discharging: 0 °C ~45 °Carging: 0 °C ~45 °C |
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Discharging:Storage temperature0 °C ~45 °C |
-10°C~ +45 °C |
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Dimension |
Length: 50±2mm (not including tabs) Width: 20±0.5mm Thickness:10±0.2mm |
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Drop Test |
The cell is to be dropped from a height of meter twice onto concrete ground. No fire, no leakage |
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Cycle time |
≥300times |
Product Features
High-Performance Battery Cell
The 300 mAh Bluetooth Battery uses a high-performance lithium polymer cell, providing stable voltage output and continuously powering Bluetooth devices for over 6 hours.
Lightweight and Durable
The lightweight aluminum casing combined with a high-temperature polymer outer shell weighs approximately 12g, making it portable and impact-resistant, extending its lifespan to 2-3 years.
Fast Charging
Supports 1C fast charging, fully charging in just 2 hours.
Intelligent Protection
Built-in overcharge, over-discharge, and short-circuit protection circuits ensure stable device operation.
Why We Are the Leading Manufacturer of 300 Mah Bluetooth Battery
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.
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.
Comprehensive Certification System
Holding CCC certification, ISO9001 quality system certification, UL certification, KC certification, and RoHS standard certification.
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.
Frequently Asked Questions
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: How do I charge the 300 Mah Bluetooth Battery?
A: Charge using a USB port or charging pad. Standard 0.5C or fast 1C charging is acceptable.
Q: Is installation complicated?
A: No. Designed for easy plugging into devices; no additional tools are required for installation.
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