Battery Charger suitable for 10440/14500/16340/17335/17500/17670/18500/18650/26650 lithium Batteries. Quick and convenient to carry, Suitable for all sizes of lithium ion rechargeable batteries, Reliable charging, Automatic identification and transformation of 3.7 V lithium ion rechargeable batteries, LED indicator is red when charging and turns green when full charged, automatically stops after full charge,