Features: 1.Best Charger for charging all RC Car, RC air and Airsoft battery packs 2.4V, 3.6V, 4.8V, 6.0V and 7.2V 2.Universal for for any NiMH /NiCd battery packs 2.4V - 7.2V (2-6 Cells pack) 3.Fast charger with current switch to select either, 0.9A and 1.8A. Deliver full charge within 1 - 2 hours 4.Smart Charger:with automatic voltage detection 5.Use pulse and negative pulse technology to avoid battery overheating during fast charging, optimized for battery pack's cycle life 6.Automatically charging ending with negative delta V 7.Worldwide usage with 120-240V AC 8.Safety protection fuse for over current, short circuit & reverse polarity protection