Normal current draw on most vehicles is in the 40-70mA range to keep radio and control unit memories alive. If your vehicle has no abnormal draw, an 800mA tender should be fine to keep both batteries charged. I use one occasionally on my truck (Cummins) if I know it's going to be dormant for a few weeks.
To anger a conservative, lie to him. To annoy a liberal, tell him the truth.
Promoted to Turdlike status 03/17/12
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