Battery Charger, Folomov A4, 3A. This is a great charger, very fast and safe. Has 4 smart, independent battery bays, two of which will charge at 3A, the other two at 2A (max, variable) It automatically identifies Li-Ion, LiFePO4, or NiMH/ NiCd batteries and chooses proper current and voltage. It has overcharge and reverse polarity protection and a beautiful, blue on black, Hi-Def LCD screen. This is a staff pick for favorite charger, and it's under $30.