2011 E91 Battery Charge

networkn · 05-24-2014, 08:02 AM

Hi There!

My Audi battery went flat and the AA rented us a trickle charger which is 12v 15amp 7 stage charger. We did our other two cars and they suggested I do my BMW as well. I am concerned with all the electronics that doing this could risk it.

Is the battery in the BMW calcium?

Is it ok to put the battery on trickle charge overnight?

E92 M Sport · 05-24-2014, 09:31 AM

Idk if the BMW battery is calcium, but I use a battery tender in my car all the time, sometimes for a week or two at a time when not using the car.

Greyfox · 05-24-2014, 10:30 AM

Battery going flat? How old was it? How long was it between parking and trying to start?

I believe the battery types in BMW's vary between years.

05-24-2014, 08:02 AM	#1
networkn Private First Class 11 Rep 112 Posts Drives: 335i 2011 Touring Join Date: Oct 2011 Location: New Zealand iTrader: (0)	2011 E91 Battery Charge Hi There! My Audi battery went flat and the AA rented us a trickle charger which is 12v 15amp 7 stage charger. We did our other two cars and they suggested I do my BMW as well. I am concerned with all the electronics that doing this could risk it. Is the battery in the BMW calcium? Is it ok to put the battery on trickle charge overnight?
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05-24-2014, 09:31 AM	#2
E92 M Sport Lieutenant 287 Rep 398 Posts Drives: 2016 F82 Join Date: Aug 2012 Location: NJ iTrader: (0)	Idk if the BMW battery is calcium, but I use a battery tender in my car all the time, sometimes for a week or two at a time when not using the car. __________________ 2016 M4 MW/SS 6mt
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05-24-2014, 10:30 AM	#3
Greyfox Colonel 1208 Rep 2,835 Posts Drives: 2007 328xi E91 - 330k+ (miles) Join Date: Feb 2014 Location: USA iTrader: (2)	Battery going flat? How old was it? How long was it between parking and trying to start? I believe the battery types in BMW's vary between years.
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