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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > Key FOB battery



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      11-07-2013, 03:03 PM   #1
NH335i
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Key FOB battery

Throwing the 335 in the garage for the winter pretty soon. Any suggestions on keeping the key fobs from dying or is it just inevitable?
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      11-07-2013, 03:36 PM   #2
alexwhittemore
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I assume you have non-CA? The battery shouldn't die by spring. One of my fobs has gone unused for a full year, no battery problems.
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      11-07-2013, 03:58 PM   #3
NH335i
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Huh?
No. Have CA.

But theres batteries inside those key fobs.
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      11-07-2013, 10:41 PM   #4
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Quote:
Originally Posted by NH335i View Post
Huh?
No. Have CA.

But theres batteries inside those key fobs.
I'd take the batteries out of the fobs. No sense in risking the battery leaking and ruining the fob. Batteries are cheap, fobs aren't.
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      11-07-2013, 10:53 PM   #5
alexwhittemore
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Quote:
Originally Posted by NH335i View Post
Huh?
No. Have CA.

But theres batteries inside those key fobs.
Oh. Yeah, in that case, just take them out. Not that the battery should asplode on you in 3 months of non-use...
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      11-07-2013, 10:58 PM   #6
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Quote:
Originally Posted by alexwhittemore View Post
Oh. Yeah, in that case, just take them out. Not that the battery should asplode on you in 3 months of non-use...
Unless you bought the 10/$1 cheapies from China (like I did). No explosions/leaks yet (knock on wood).
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      11-07-2013, 11:49 PM   #7
ctuna
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CA batterys are cheap

CA batterys are cheap
I wonder if there is some kind of inductive charger you could use on the
other type?
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      11-08-2013, 03:48 PM   #8
NH335i
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Sounds good.
Thanks.

I just wasnt sure if by taking the batteries out the fobs memory would be gone
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      11-08-2013, 07:46 PM   #9
ctuna
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I bought 5 cr2032 ca fob batterys for 2 bucks

I bought 5 cr2032 ca fob batterys for 2 bucks
They were maxells and a dollar of the price was for shipping .
It was amazon I think.
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      11-10-2013, 11:07 PM   #10
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Remember the Car Battery

You might have already thought of this but don't forget about the car battery. If you leave it sitting for awhile the battery will drain. I just left the dealer Friday because my FOB wouldn't work properly with comfort access. I was told that I didn't "drive" the car enough and the battery drained making some remote functions not work properly.

Since I have a convertible, I am doing the same thing and keeping my E93 up for the winter. Solution - I bought an "Advanced Battery Charging System" from BMW. Cost $70. It plugs into the battery connections under the hood and then into an electrical outlet. I think it's worth it so when I get ready to crank it up again I won't have to worry about the battery or paying $500 for a new one.

They also make one solar powered but I believe you said it will be in the garage so that won't work.

Just a suggestion.
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      11-11-2013, 05:02 AM   #11
NH335i
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Ah yes. Agreed. Was definitely gonna buy a battery tender and leave it on there all winter.

Not trying to have to buy a battery right when I want to drive it again after the winter.
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