GEILIENERGY 7.2V Rechargeable Replacement Battery Pack with Tamiya Connector For charging 4-6 cells Ni-CD and Ni-MH batteries Universal, smart battery pack charger with voltage detection: automatically detects what voltage your battery pack is and charge it. Charge your NiMH or NiCd battery packs that are4.8V, 6V, 7.2V Easy to read LED Lights: Know the current charging status when charging with the LED light. Green = Fully Charged. Red = Charging. Use this charger with your NiMh NiCd battery packs for Airsoft, RC Cars, RC toys