battery charging?

ejw2011 · 12-18-2014, 12:41 PM

My ctek battery tester indicates a weak/bad battery. Does anyone know if I should recharge directly to the battery in the trunk or from the hood's terminal post?

Also, if battery is bad and can no longer hold a charge, any thoughts on duralast or interstate battery H8?
thanks

Want the thrill · 12-18-2014, 12:49 PM

Charge it from the front terminal post.

Pitiful Old Man · 12-18-2014, 02:01 PM

If you're still in the warranty period, your dealer should replace the battery for $0.
Confirm that the CTEK connection via the posts in the engine compartment is correct. I use a CTEK fairly often, just to maintain the battery when the car is idle for days at a time. I think that the BMW supplied battery is a pretty good one. You may have just been unlucky.

ejw2011 · 12-18-2014, 02:20 PM

I did check the connections and made sure it registered on the ctek. Tested both at the terminal post and directly at the battery. Only have 6 months before warranty is up, but my understanding is BMW does not consider a battery under warranty but as maintenance to recharge.

Pitiful Old Man · 12-19-2014, 02:19 PM

If it's a defective battery, they should replace it. A good dealer will do this and check the charging system for you at no cost. A somewhat less than good dealer may want to pro-rate it based on the battery warranty. A bad dealer will charge you for a new battery.

pprevill · 02-10-2015, 08:07 PM

Did you do a permanent connection with confort cable to charge your battery ? I'm looking for an easy solution to hook a ctek charger to the charging post in the hood of my x3 but don't know if the ctek cable will fits ? They seem to have 3 options on their web site :

Choose M6 for smaller batteries like motorcycle/lawn tractor.
Choose M8 for top post batteries.
Choose M10 for side post batteries.

Someone has already hook one of these ?

Also did you use 'cold mode' type charging ? Seems to be best for agm batery but not so clear since not all battery vendor listed ?

Thank you !

Peter_R · 02-12-2015, 10:46 AM

pprevill

You posted the above similar question twice. The complete answer is in the following thread...

http://x3.xbimmers.com/forums/showthread.php?t=1090356

12-18-2014, 12:41 PM	#1
ejw2011 Second Lieutenant 94 Rep 287 Posts Drives: x3 F25 35i, x1 F48 28i Join Date: Aug 2011 Location: Planet Earth iTrader: (1)	battery charging? My ctek battery tester indicates a weak/bad battery. Does anyone know if I should recharge directly to the battery in the trunk or from the hood's terminal post? Also, if battery is bad and can no longer hold a charge, any thoughts on duralast or interstate battery H8? thanks
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12-18-2014, 12:49 PM	#2
Want the thrill Lieutenant Colonel 330 Rep 1,560 Posts Drives: 2022 X4M40i, retired ‘11 X3 Join Date: Mar 2011 Location: MI iTrader: (2) Garage List 2022 X4M40i [10.00]	Charge it from the front terminal post.
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12-18-2014, 02:01 PM	#3
Pitiful Old Man Private 2 Rep 54 Posts Drives: 2011 X3 35i Join Date: Oct 2013 Location: Colorado iTrader: (0)	If you're still in the warranty period, your dealer should replace the battery for $0. Confirm that the CTEK connection via the posts in the engine compartment is correct. I use a CTEK fairly often, just to maintain the battery when the car is idle for days at a time. I think that the BMW supplied battery is a pretty good one. You may have just been unlucky.
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12-18-2014, 02:20 PM	#4
ejw2011 Second Lieutenant 94 Rep 287 Posts Drives: x3 F25 35i, x1 F48 28i Join Date: Aug 2011 Location: Planet Earth iTrader: (1)	I did check the connections and made sure it registered on the ctek. Tested both at the terminal post and directly at the battery. Only have 6 months before warranty is up, but my understanding is BMW does not consider a battery under warranty but as maintenance to recharge.
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12-19-2014, 02:19 PM	#5
Pitiful Old Man Private 2 Rep 54 Posts Drives: 2011 X3 35i Join Date: Oct 2013 Location: Colorado iTrader: (0)	If it's a defective battery, they should replace it. A good dealer will do this and check the charging system for you at no cost. A somewhat less than good dealer may want to pro-rate it based on the battery warranty. A bad dealer will charge you for a new battery.
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02-10-2015, 08:07 PM	#6
pprevill New Member 6 Rep 10 Posts Drives: 2013 X3 CB Join Date: Feb 2015 Location: QC, Canada iTrader: (0)	Ctek battery charger Did you do a permanent connection with confort cable to charge your battery ? I'm looking for an easy solution to hook a ctek charger to the charging post in the hood of my x3 but don't know if the ctek cable will fits ? They seem to have 3 options on their web site : Choose M6 for smaller batteries like motorcycle/lawn tractor. Choose M8 for top post batteries. Choose M10 for side post batteries. Someone has already hook one of these ? Also did you use 'cold mode' type charging ? Seems to be best for agm batery but not so clear since not all battery vendor listed ? Thank you !
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02-12-2015, 10:46 AM	#7
Peter_R Air Vice Marshall 256 Rep 1,639 Posts Drives: X1 LCI xDrive 2.0i M Sport Join Date: Nov 2014 Location: Somewhere in Blighty (UK) iTrader: (0)	pprevill You posted the above similar question twice. The complete answer is in the following thread... http://x3.xbimmers.com/forums/showthread.php?t=1090356 __________________ 2007 BMW 325d M Sport remapped (E91). 2012 BMW 320d Sport (F31). 2013 BMW X3 xDrive 30d M Sport (F25). 2020 BMW X1 xDrive 2.0i MSport (F48). 2022 MB EQB 300 4MATIC AMG Line Premium
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