I wonder if maybe you had an older Rule pump Paul? I have a Rule 500 GPH that only draws 1.9 AH. I only mention this because I know that Rule pumps are easy to find and order online. I'm also running a 10 AH (vise a 7 AH)12v battery by Gruber. It's a high performance sealed deep cycle battery. About $40 including shipping on ebay. UB12-B Voltage Style 12 VoltsCranking Power 180 Cold Cranking AmpsLength 6"Width 3.5"Height 5.13"Weight 7.8 lb Deep Discharge