JE Airsoft Smart Charger for 5-10 Cells Fast NiMH/NiCD Battery Pack (6V-12V) Universal for All RC Car, Airplane & Toys Use pulse and negative pulse technology to avoid battery overheating during fast charging, optimized for battery pack's cycle life. High quality smart charger for any NiMH/NiCD battery packs from 6V-12V (5-10 cell pack) Temperature sensor to protect battery pack from over heating. Smart charger with automatic voltage detection. Automatically charging ending with negative delta V Fast charger with current switch to select either 1A or 2A charged Full safety protection fuse for over current, short circuit and reverse polarity