BATTERY REPLACEMENT FOR GS PORTALAC PE12V17 ,12V 18AH EACH - 2 Pack UPG # D5745 UB12180 12V 18Ah. Pack of 2 Dimensions: 7.15 inches x 3.06 inches x 6.60 inches. Weight: 11.40 Lbs SLA/AGM maintenance free, spill proof battery Rechargeable battery that can be mounted in any position, resists shocks and vibration 1 Year Warranty