Thanks for the input everyone. Consensus mostly seems to be to use a small switch with a big FET, and that's what I'll do (it integrates nicely into the target circuit as well, since I wanted a FET involved anyway so the circuit could kill itself on low battery and avoid discharging dangerously far). Chris --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .