my thought exactly, i had to check twice. it must be due to the electronics in teh box being active when the doors are unlocked, so generally when ulocked, it will be running so not a problem, and generally for long periods of time when left, would normally be locked, so drain is next to nowt,,,

pretty simple maths though,, 10X the drain = 10X shorter battery life, after 10 weeks, you would noty be too upset if it was a little sluggish turning over, but after just 1 week , hell no