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Old 16-04-17, 12:46
Pleiades Pleiades is offline
XT-Moto SuperStar
 
Join Date: Aug 2010
Location: North Norfolk
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Just to confirm all USB sockets consume current even when nothing is plugged in. If not isolated or ignition-switched the step-down transformer in them can consume up to 50-60 mA. This is enough to make starting after about 80 hours (3-4 days) challenging and completely flatten a 9Ah battery in 180 hours (a week).

USB sockets must be switched/isolated when not in use.