Key Fob Battery

LarrySinNJ · 03-10-2014, 02:22 PM

In my E90, putting the key fob in the slot supposedly charged the battery. I would switch out the fobs monthly (I'm the only driver). Leasing three E90s, never had a fob battery die. Now with no in car "charger", should I alternate the fobs, and how long should I expect the battery to last?

M2Cmtl · 03-10-2014, 03:06 PM

I've wondered about this as well.

n55x3 · 03-10-2014, 03:19 PM

We got 2 years out of my wife's 2011 X3 fobs. Used daily. I actually just replaced the battery about a month ago. 5 minute job. Takes longer getting the battery from the store. My X3 fob which is used maybe once a week is still going strong. Not throwing any replace battery messages on iDrive.

I'd think the hassle of rotating fobs to extend battery life would not be worth all the troubles of messing with profiles etc.

Bluelondon · 03-10-2014, 03:36 PM

Just buy a spare battery and replace it when the time comes. Not that big of a deal.

03-10-2014, 02:22 PM	#1
LarrySinNJ Lieutenant 122 Rep 425 Posts Drives: 2019 330i xDrive Join Date: Jan 2007 Location: New Jersey iTrader: (0)	Key Fob Battery In my E90, putting the key fob in the slot supposedly charged the battery. I would switch out the fobs monthly (I'm the only driver). Leasing three E90s, never had a fob battery die. Now with no in car "charger", should I alternate the fobs, and how long should I expect the battery to last? __________________ 2019 G20 330i xDrive Med. Blue/Cognac Leather ZCV\|ZPP\|ZPX\|HK\|Remote Start (Ret'd) 2016 F06 640i xDrive Med. Blue/Red Leather MSport\|B&O\|Driver Asst+\|Cold\|Night (Ret'd) 2013 F30 335i xDrive Mineral Grey/Black Leather (Ret'd) 2011 E90 328i xDrive Space Grey/Black Leather(Ret'd) 2009 E90 328i xDrive Monaco Blue/(Ret'd) 2007 E90 328i xDrive Graphite (Ret'd)
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03-10-2014, 03:06 PM	#2
M2Cmtl Major 915 Rep 1,153 Posts Drives: 21 Q7 & 22 4XE Join Date: Sep 2013 Location: Montreal iTrader: (0)	I've wondered about this as well. __________________ 2020 M2C 24.04.2020 delivery - Sold 24.08.22
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03-10-2014, 03:19 PM	#3
n55x3 Captain 72 Rep 876 Posts Drives: n55 BMWs Join Date: Dec 2011 Location: us - ohio iTrader: (0)	We got 2 years out of my wife's 2011 X3 fobs. Used daily. I actually just replaced the battery about a month ago. 5 minute job. Takes longer getting the battery from the store. My X3 fob which is used maybe once a week is still going strong. Not throwing any replace battery messages on iDrive. I'd think the hassle of rotating fobs to extend battery life would not be worth all the troubles of messing with profiles etc.
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03-10-2014, 03:36 PM	#4
Bluelondon Second Lieutenant 45 Rep 232 Posts Drives: 2017 X3 35i Join Date: Jul 2009 Location: California, USA iTrader: (0)	Just buy a spare battery and replace it when the time comes. Not that big of a deal.
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