Description: Portable Battery Charger: rechargeable battery charger support usb chargering.Capable of charging 2 pcs different battery simultaneously. Automatically detects battery power status and select the appropriate voltage and charge mode The battery charger 2 Slots can be adjustable for different battery length, the battery will not be over-charged and over heat. USB Battery charger with Red/Green led light display (charging: red light, full charge:green light). High energy density: USB Battery charger is safe and smart,it will stop charging automatically when battery was fully charged. Specification: Input parameters: DC 5V 1-2A Output parameters: DC 4.2V 1000mA Series: 18650 charger Number of slots: 2 slots Size Chart: 60x35x12mm/2.36x1.38x0.47inch Package Includes: 1 Piece Charger 1 Piece USB Cable 1 Piece Manual Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!