Answer varies by rig, based on battery condition/ age/ charge, and also on phantom loads. I have only 1-USB power socket w/ LED and LPG ALARM that are phantom, others w/ LPG solenoid will have BIG drain. Mine I experimented, monitoring battery, Unplugged 2-weeks w/ battery switch= ON had NO Noticeable effect. Battery 4yo, previous was 7yo. LUCK
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THenne1713
2000 Conquest LE 6266, Class-C on 99-E450SD, 6.8, 2v, V-10
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