Yeah I wondered that as I had read part of the Keystart manual on the forum and it sounds like the original Victa trickle charger had a much lower mA rating than my car charger. I was actually more concerned about wrecking my charger as I was willing to buy a new battery as I thought it would have been completely dead. It was 11.11 volts on the millimeter before charging and after overnight got to 13.1 Thanks Nornk