Battery

mr_z4mc1m_oz · 04-20-2011, 09:13 PM

Quick question, I'm going away for 5 weeks, should I disconnect my battery? or will it be ok when I get back?

Thanks

Rick Hunter · 04-20-2011, 11:15 PM

Battery Tender is your friend.

z4mnyc · 04-20-2011, 11:53 PM

+1 for battery tender

santov · 04-21-2011, 03:36 AM

Battery Tender is your friend because it will keep your battery alive AND it will save you from having to reprogram your windows if/when you disconnect the battery.

MinneapolisJeff · 04-21-2011, 09:28 AM

my battery was fine after 5 months of storage

rsutoratosu · 04-21-2011, 01:32 PM

really ? mine died after 1 month and the car went into maintenance aka transport mode.. no ac, no defogger, etc.. Had to get it reset at the dealer.. driving there wasn't fun when the inside keep fogging up

esqu1re · 04-21-2011, 01:45 PM

Battery tender, or get a cheap one from walmart; most people will bash walmart-anything, but I think it'll be ok for 5 weeks. I use a walmart tender every few weeks of daily driving short 8 minute trips to top off the battery.

zkeeper · 04-21-2011, 03:31 PM

Right on with most above...why even chance it. 5 weeks is probably OK..but I would not. I am away a lot, and the battery tender is simply the best insurance you can get for a batt. If you can afford the car, you can afford the tender. Ahhh, sweet the price of peace.

santov · 04-21-2011, 03:35 PM

The smallest of motorcycle battery maintainers is around $40. Cyclegear had this one on sale for $18 on Black Friday.

It will recharge a battery over several hours and maintain a battery for indefintely. I'd suggest hooking up directly to your battery. The ones that connect through your cigarette socket seem sketchy.

http://www.cyclegear.com/spgm.cfm?L1...m=DEL_021-0123

ANUSTART · 04-21-2011, 04:10 PM

Battery Tender FTW!

MinneapolisJeff · 04-21-2011, 04:24 PM

Quote:

Originally Posted by rsutoratosu

really ? mine died after 1 month and the car went into maintenance aka transport mode.. no ac, no defogger, etc.. Had to get it reset at the dealer.. driving there wasn't fun when the inside keep fogging up

Yup, was surprised too. Even checked the voltage before I first started it...just a tad below 14V

Now this is a 1 yr old battery mind you and was stored in a heated garage this time. The previous died while in cold(er) storage last year while a battery tender was in use. BTW, I didn't have to have to reset anything at the dealership, the car "relearned" during the 50 mile drive home

rsutoratosu · 04-22-2011, 11:47 AM

I didnt drive my car for the week, I think I should just get a new battery at this point, went into transport mode again.. now I gotta drag it to the dealer for another reset...

how much are these battery anyway?

esqu1re · 04-22-2011, 12:09 PM

Free if you are still in the warranty period. Upwards of 150+ from the dealer I think. Just go to sams club and get a comparable sized battery for much cheaper. It does what it's supposed to do.

rsutoratosu · 04-25-2011, 02:29 PM

how does the car determine when to go into transport mode ? ie if i swap the battery, would the computer go into transport mode ? ie if i get it reset again, and swap the battery after, would i need to go to bmw to get it after ?

04-20-2011, 09:13 PM	#1
mr_z4mc1m_oz Captain 272 Rep 662 Posts Drives: BMW Z4 M Coupe & 1M Join Date: May 2009 Location: Sydney Australia iTrader: (0)	Battery Quick question, I'm going away for 5 weeks, should I disconnect my battery? or will it be ok when I get back? Thanks __________________ Current: Z4MCoupe, Interlagos Blue, Carbon Extended Leather, Sat Nav, Heated Seats, Supersprint Exhaust, BBS CH19's, Stubby Aerial. AND E82 1M, Alpine White Sold: 3 x 130i (White, Red & Black), Mk4 VW Golf R32, '03 Reno Clio Sport
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04-20-2011, 11:15 PM	#2
Rick Hunter Skull Squadron Leader 304 Rep 2,031 Posts Drives: '07 M Coupé & '16 435xi GCoupé Join Date: May 2007 Location: The Emerald City iTrader: (20)	Battery Tender is your friend. __________________
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04-20-2011, 11:53 PM	#3
z4mnyc Private First Class 14 Rep 191 Posts Drives: Z4 M Coupe Join Date: Feb 2011 Location: New York iTrader: (2)	+1 for battery tender __________________ \| Z4MC \| KW Clubsport \| BBS-RGR 19 + Bridgestone RE11 \| BBS-RGR 18 + Hoosier R6 \| Sparco DTM RS \| Vorshlag mounts \| Braille battery \| Euro Headers \| Supersprint exhaust \| Stoptech lines \| Stongstrut \| TCK camber arms \| UUC SSK \| APR GT-200 wing & splitter \| ESS Tune \| Speedware Motorsports custom roll cage \| Schroth harness \|
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04-21-2011, 03:36 AM	#4
santov Lieutenant 64 Rep 483 Posts Drives: 2007 Z4 3.0si White over Beige Join Date: Dec 2010 Location: Bay Area, Calif iTrader: (8)	Battery Tender is your friend because it will keep your battery alive AND it will save you from having to reprogram your windows if/when you disconnect the battery.
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04-21-2011, 09:28 AM	#5
MinneapolisJeff First Lieutenant 8 Rep 326 Posts Drives: 2003 BMW Z4 3.0i Join Date: May 2009 Location: Minneapolis/St. Paul iTrader: (0)	my battery was fine after 5 months of storage __________________ the stable: 2003 BMW Z4 3.0i 2020 Mitsubishi Outlander SE 2021 Jeep Gladiator Rubicon
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04-21-2011, 01:32 PM	#6
rsutoratosu Captain 114 Rep 779 Posts Drives: Z4 3.0i Join Date: Mar 2011 Location: Chicago, IL iTrader: (0)	really ? mine died after 1 month and the car went into maintenance aka transport mode.. no ac, no defogger, etc.. Had to get it reset at the dealer.. driving there wasn't fun when the inside keep fogging up __________________ -Roranji
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04-21-2011, 01:45 PM	#7
esqu1re Lieutenant Colonel 41 Rep 1,855 Posts Drives: M Coupe Join Date: Jul 2010 Location: East Coast iTrader: (0)	Battery tender, or get a cheap one from walmart; most people will bash walmart-anything, but I think it'll be ok for 5 weeks. I use a walmart tender every few weeks of daily driving short 8 minute trips to top off the battery. __________________ ///M Coupe: RPI Scoop, OE Strut, CDV, Volk RE30, SS Brake Lines, Stromung Exhaust
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04-21-2011, 03:31 PM	#8
zkeeper Captain 208 Rep 602 Posts Drives: 2017 M2 & 08 Z4 si Join Date: Oct 2008 Location: BimmerHaven iTrader: (0)	Right on with most above...why even chance it. 5 weeks is probably OK..but I would not. I am away a lot, and the battery tender is simply the best insurance you can get for a batt. If you can afford the car, you can afford the tender. Ahhh, sweet the price of peace.
	Appreciate 0 Quote

04-21-2011, 03:35 PM	#9
santov Lieutenant 64 Rep 483 Posts Drives: 2007 Z4 3.0si White over Beige Join Date: Dec 2010 Location: Bay Area, Calif iTrader: (8)	The smallest of motorcycle battery maintainers is around $40. Cyclegear had this one on sale for $18 on Black Friday. It will recharge a battery over several hours and maintain a battery for indefintely. I'd suggest hooking up directly to your battery. The ones that connect through your cigarette socket seem sketchy. http://www.cyclegear.com/spgm.cfm?L1...m=DEL_021-0123
	Appreciate 0 Quote

04-21-2011, 04:10 PM	#10
ANUSTART Captain 35 Rep 956 Posts Drives: Z4 Join Date: Oct 2010 Location: IL iTrader: (0)	Battery Tender FTW!
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04-22-2011, 11:47 AM	#12
rsutoratosu Captain 114 Rep 779 Posts Drives: Z4 3.0i Join Date: Mar 2011 Location: Chicago, IL iTrader: (0)	I didnt drive my car for the week, I think I should just get a new battery at this point, went into transport mode again.. now I gotta drag it to the dealer for another reset... how much are these battery anyway? __________________ -Roranji
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04-22-2011, 12:09 PM	#13
esqu1re Lieutenant Colonel 41 Rep 1,855 Posts Drives: M Coupe Join Date: Jul 2010 Location: East Coast iTrader: (0)	Free if you are still in the warranty period. Upwards of 150+ from the dealer I think. Just go to sams club and get a comparable sized battery for much cheaper. It does what it's supposed to do. __________________ ///M Coupe: RPI Scoop, OE Strut, CDV, Volk RE30, SS Brake Lines, Stromung Exhaust
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04-25-2011, 02:29 PM	#14
rsutoratosu Captain 114 Rep 779 Posts Drives: Z4 3.0i Join Date: Mar 2011 Location: Chicago, IL iTrader: (0)	how does the car determine when to go into transport mode ? ie if i swap the battery, would the computer go into transport mode ? ie if i get it reset again, and swap the battery after, would i need to go to bmw to get it after ? __________________ -Roranji
	Appreciate 0 Quote