XC4.0 Battery, Battery Capacity 4 Ah, Battery Chemistry Li-Ion, Number of Batteries Included 2, Voltage 12V DC, Charger Input Voltage Not Applicable, Battery Series M12(TM) REDLITHIUM(TM), Overall Height 4 3/8 in, Overall Length 3 1/2 in, Overall Width 2 5/8 in, Weight 0.9 lb, Wireless Tracking System Not Applicable