EN-EL20 OAproda Micro USB Battery Charger for Nikon ENEL20,EN-EL20a Battery, Nikon Coolpix A, Nikon 1 AW1,Nikon 1 J1,Nikon 1 J2,Nikon 1 J3,Nikon 1 S1,Nikon 1 V3, Replace Nikon MH-27 charger Ultra Thin : Only 1.5 CM, Light Weight, Space-saving, Easy to Carry ,charge anywhere anytime, convenient to use.Patented OEM CE and ROHS safety certification. Micro Input: DC 5V+/-5%,Output: DC 8.4v +/-0.05v, 500mA (Max).Charger is Fully Compatible with Nikon ENEL20,EN-EL20a Battery, Nikon Coolpix A , Nikon 1 AW1, Nikon 1 J1, 1 J2, 1 J3, Nikon 1 S1, Nikon 1 V3 Digital Cameras, MH-27 charger. USB input : Multiple Charging Option: the ability to charge with a USB wall charger, car charger, Portable Power Source, or external battery .Gives you more options than a standard battery charger. CPU control:The newest generation of CPU control, IC chip, double PCB panel, Built with multiple circuit protection ( over-charging,over current, over voltage, short-circuit, high-temperature, ). Fast and Safe charging. For Security, do NOT Charge your Battery / Charger with Computer, in order to Avoid any possible Damages of Computer from High Temperature. The computer USB port mainly supports data transmission, rather than charges other products.