Combo: Tenergy 1-4 Cells Li-PO/Li-Fe Balance Charger with 11.1 volt 900mAh 25C Lipo Battery Pack Built-in balancer. Batteries are automatically balanced during charging, ensuring full charge Advanced individual charging method-charge each cell individually Fits 1S to 4S Li-PO/Li-Fe battery packs with XH type balance connector Charge Rate: 1A (1,000mah per hour) 11.1 volt 900mAh 25C Li-Poly Lipo Battery Pack