1. Four protections: Overcharge protection/overdischarge protection/overtemperature protection/overcurrent protection 2. USB interface charging, compact and easy to carry 3. Power indicator function, red light when charging, green light when full 4. Compatible with multiple batteries: 10440/14500/16340/16650/14650/18350/18500/18650 5. A single gross weight is about 35 g
