Originally Posted by buff5
Thought the trunk lite was the problem, wrong, back again in 4 days, dead battery. Been a mechanic for 55 years & a car dealer for 40 & never quite had this problem ever. Previosly checked charging rate, 14.2, right on, checked battery drain 1/2 a amp, right on, charged battery & put on a loadmeter, stays right in the good range!!. Left cables connected, two days parked & its dead again, charged battery, took off negative cable, two days & its dead again!, car now put away for winter, next spring new battery, oh yes, trunk lite still disconnected.
1/2 amp drain is huge. Typical battery drain is less than 50 mA (0.05A) with an inactive car. Did you mean 50 mA?