I'm working on a 486 board from 1992'ish. It has 2 batteries an onboard rechargeable and an external removable pack. Both operate in the 3.6V - 4.5V range.

Problem is there's high current draw on both batteries. About 6ma. Normally it should be around 5-10uA at most.

I swapped out the 82c206 to no effect. But with that chip out of circuit, the current draw is null.

Any ideas where I can get schematics or example circuits or any info that'd be helpful in tracking it down? Had enough false starts and ideas that didn't change anything.