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      10-02-2014, 11:26 AM   #1
SWOT1
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Original battery longevity??

This question goes out to 2008-2009 owners specifically... How many of you still have your original battery (as I do), and what is the maximum life we can get out of it? My battery started showing all the obvious signs of dying out nearly a year ago, but since using a battery tender - ZERO issues!! Is 7-8 years possible??
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      10-02-2014, 11:50 AM   #2
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Do you use a tender every day?
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      10-02-2014, 11:53 AM   #3
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Changed the original battery in my sold in May of 2008 E90M3 in about May of 2013. Car was mostly driven, not parked (about 55k miles at the time).
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      10-02-2014, 12:02 PM   #4
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My story about a battery charger....

On my previous BMW I had every 5-6 months a new battery,the cause was a high end powerful Alpine sound system with 14 speakers and 2 subs ,and 4 amplifiers after 5 battery's I decided to buy a battery tender for overnight charging in all weekends ...the result was that the last battery I had for 14 years and was the ultimate proof that a battery charger prolongs the life time of a battery .
Now with my ///M i'm doing exactly the same thing ,and so the answer to your question is "yes" ,easely 7-8 years and more...
BTW...last winter my car sat for more than 4 months in my garage on my CTEK,don't drive with the ///M on roads with road salt and ice ,after the hibernation the ///M started just perfect,and this was another proof that a battery tender is needed for our cars !
Pics...? # 26 => http://www.m3post.com/forums/showthr...1#post15488771
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Last edited by ///M Power-Belgium; 10-02-2014 at 12:13 PM.
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      10-02-2014, 12:14 PM   #5
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      10-02-2014, 12:18 PM   #6
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i have an 09 that started showing signs of problems in June of this year. tech said it was an 09 battery. not bad considering our summer heats in TX (very mild winters).
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      10-02-2014, 01:02 PM   #7
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Thanks for all the input!! Keep 'em coming! (FYI - my ride: 2009 E93 M3, only 27K miles, always garaged, drive on average 2-3 times a week, and only use the battery tender when I drive her less than twice a week.) Hoping to get another year+ out of the battery!

*Definitely recommend a battery tender to everyone with an older battery, who drives less than 2-3 times a week or who hibernates their M for the winter... well worth the $$!
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Last edited by SWOT1; 10-02-2014 at 01:55 PM.
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      10-02-2014, 01:04 PM   #8
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I drive my E90 M3 about once a week and it is starting to weaken [starts are not as strong] with about 5.5 years on it. Usually hooking it up to a tender overnight makes it good again for a month or two. I estimate that I will change it proactively before next winter, but it is possible that it may need to be changed before then.
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      10-02-2014, 01:06 PM   #9
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Quote:
Originally Posted by SWOT1 View Post
Thanks for all the input!! Keep 'em coming! (FYi - my ride: 2009 E93 M3, only 27K miles, drive on average 2-3 times a week, and only use the battery tender when I drive her less than twice a week.) Hoping to get another year+ out of the battery!
Sure you can ! Just keep her every weekend overnight on the battery tender .
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      10-02-2014, 01:06 PM   #10
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Quote:
Originally Posted by ///M Power-Belgium View Post
My story about a battery charger....

On my previous BMW I had every 5-6 months a new battery,the cause was a high end powerful Alpine sound system with 14 speakers and 2 subs ,and 4 amplifiers after 5 battery's I decided to buy a battery tender for overnight charging in all weekends ...the result was that the last battery I had for 14 years and was the ultimate proof that a battery charger prolongs the life time of a battery .
Now with my ///M i'm doing exactly the same thing ,and so the answer to your question is "yes" ,easely 7-8 years and more...
BTW...last winter my car sat for more than 4 months in my garage on my CTEK,don't drive with the ///M on roads with road salt and ice ,after the hibernation the ///M started just perfect,and this was another proof that a battery tender is needed for our cars !
Pics...? # 26 => http://www.m3post.com/forums/showthr...1#post15488771
Lol. You reference your link to your tender any chance you get! Thanks to you I bought one and don't even need it.
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      10-02-2014, 01:18 PM   #11
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Quote:
Originally Posted by tinman831 View Post
Lol. You reference your link to your tender any chance you get! Thanks to you I bought one and don't even need it.
Advice...
In this situation you need to stop reading my comments !
BTW...you saw it before,but who says that OP saw it ?
And my comment was adressed to OP to help him with his battery and not to you.........
Further questions ? I'm here....?!?!
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      10-02-2014, 01:26 PM   #12
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Quote:
Originally Posted by ///M Power-Belgium View Post
Advice...
In this situation you need to stop reading my comments !
BTW...you saw it before,but who says that OP saw it ?
And my comment was adressed to OP to help him with his battery and not to you.........
Further questions ? I'm here....?!?!
I didn't mean it as an insult. Your recommendation in the other thread was very informative and was what led me to buy the product in the first place.
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      10-02-2014, 01:34 PM   #13
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Quote:
Originally Posted by tinman831 View Post
I didn't mean it as an insult. Your recommendation in the other thread was very informative and was what led me to buy the product in the first place.
That sounds much better !
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      10-02-2014, 01:43 PM   #14
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Quote:
Originally Posted by ///M Power-Belgium View Post
Advice...
In this situation you need to stop reading my comments !
BTW...you saw it before,but who says that OP saw it ?
And my comment was adressed to OP to help him with his battery and not to you.........
Further questions ? I'm here....?!?!
I read.. I laughed... it's all good!!
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      10-02-2014, 01:45 PM   #15
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Wow that is some excellent battery life. Wish mine lasted for longer than 3 years out here in AZ.
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      10-02-2014, 01:48 PM   #16
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You can easily get 7-8 years if your car is garaged and you use a battery tender.
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      10-02-2014, 01:48 PM   #17
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Quote:
Originally Posted by tinman831 View Post
Lol. You reference your link to your tender any chance you get! Thanks to you I bought one and don't even need it.
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      10-02-2014, 02:03 PM   #18
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2008, 73k miles, still on original battery. No battery tender, driven every day
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      10-02-2014, 02:16 PM   #19
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2008 owner here. March 2008 build, 44k miles, always garaged with tight temperature ranges between 50 degrees - 70 degrees. The car is now driven every day, whereas it use to average less than 8k miles a year.

I only recently started using battery tender off-and-on, still holding strong. The car starts like it has on day 1 of ownership. I will start charging more often now, likely will charge around at least twice a week now.
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      10-02-2014, 02:44 PM   #20
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My used car gave out about 3.5 years and 35k miles after manufacture
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      10-02-2014, 03:17 PM   #21
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Quote:
Originally Posted by SWOT1 View Post
I read.. I laughed... it's all good!!
Was just thinking...not sure , but was it you with the chrome ///M220 wheels ?
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      10-02-2014, 03:33 PM   #22
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Quote:
Originally Posted by ///M Power-Belgium View Post
Was just thinking...not sure , but was it you with the chrome ///M220 wheels ?
Yes, sir!
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