E46Fanatics - View Single Post - Key FOB Battery question
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Old 11-14-2012, 12:33 PM   #5
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Join Date: Mar 2007
Location: the barnyard
Posts: 2,458
My Ride: '79 Massey Ferguson
I am 90% sure the fob uses a lithium battery...in which case, it would be better to leave it out. The self-discharge rate is low enough to last the winter months, and keeping a lithium battery at 100% SOC only reduces capacity and cycle life.
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