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That may account for the differences in experiences in these posts where the power liftgate continues to draw current despite the battery saver whereas the manual liftgate does not. This is the kind of stuff than can have undocumented differences from year to year or trim to trim so the only real answer is in testing.A month after I bought my 2021 CX-5 and was detailing the car, leaving the trunk open. After about an hour or so, I heard a couple of beeps and shortly thereafter, when I went to start it up, battery was dead. Dealer said that this was a function of the power liftgate. Dunno, but I do know that I won't leave the trunk open for any more than I have to.
Short of an extended test in a garage, leaving the liftgate open for several hours while being prepared to jump it, to be safe the answer is to disconnect the battery when tailgating or whatnot.
When I disconnected my battery for two months last winter I was surprised to find the radio station presets were still there, evidently stored in some non-volatile memory. I also detected no difference in performance, so it appears performance adjustment codes (or should I say "settings" for the benefit of one banned poster ) were likewise retained in non-volatile memory in my vehicle in any case.
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