Does a HB 798 si have any drain on a battery if it is turned off but still plugged into the power plug? Haven't used my boat in two months but did recharge both troll motor and motor cranking battery after last use of it. When I got too the lake the motor battery was dead as a door nail. Jumped it off and ran down the lake a little ways and it charge right up enough to crank it. I know some motors put a drain on a battery when the have computer chips in them.