The Traxxas 2927R AC 500Mah NiMH charger uses a wall outlet to charge your 7 Cell (8.4V) NiMH batteries efficiently. A status LED informs you when your battery is ready. The 2927R charger is for NiMH batteries only and should never be used to charge lipo batteries. Use Traxxas stock and hop-up replacement parts to get the most out of your Traxxas RTR vehicles. This product is made from high quality materials and designed for long-lasting performance. This is replacement hardware for use on Traxxas vehicles; consult your user's manual for exact parts listings.