Tenergy Universal Premium Battery Smart Charger - Fast Charging Speed Automatically shuts off charge if a short circuit or fully charged battery is detected Charges NiMH and NiCD Airsoft Batteries in less than half of the time it takes a standard wall charger Includes both Large and Small Type Tamiya battery connectors Prevents battery overheating and prolongs overall battery life Compatible with most 7.2v to 12v airsoft batteries