Universal Power Group 6V 4.5Ah Light Alarms 2FL-1 Replacement Rhino Battery - 6 Pack UPG #D5733 UB645 6V 4.5Ah. Pack of 6 Dimensions: 2.78 inches x 1.88 inches x 4.18 inches. Weight: 1.59 Lbs SLA/AGM maintenance free, spill proof battery Rechargeable battery that can be mounted in any position, resists shocks and vibration 1 Year Warranty