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E63 / E64 6 Series (2003 - 2013)
The E63/E64 BMW 6 Series builds on BMW's sporty heritage with aggressive lines and an incredible motor to back the design up. Available in coupe and convertible trims with a standard 4.8 liter engine producing 360 horsepower and 360 lb-ft of torque, the 6-series is a popular choice that exceeds expectations.

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  #1  
Old 05-16-2010, 10:05 AM
bokmeipai bokmeipai is offline
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Battery Tender Question

I am planning to be away for 8 days, should I keep my 6er on the battery tender? And if I do will it be safe from overcharging or burning out unit? In the winter when I have not used car for 3-4 days and not hooked up to tender I noticed time and radio stations are lost when started up.
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  #2  
Old 05-16-2010, 10:26 AM
Solution Six Solution Six is offline
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That's very odd that after a few days you'd lose all power. Sounds to me like either something electronic is not shutting off properly, your charging system isn't fully functioning, or your battery is in need of replacement?
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  #3  
Old 05-16-2010, 02:01 PM
bokmeipai bokmeipai is offline
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Quote:
Originally Posted by Solution Six View Post
That's very odd that after a few days you'd lose all power. Sounds to me like either something electronic is not shutting off properly, your charging system isn't fully functioning, or your battery is in need of replacement?
It doesn't lose all power, I can still start car. Since I have been driving it daily now since March it never had a problem. I doubt battery is dead since car is an 08 with 12k miles on ODO.
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Old 05-16-2010, 03:17 PM
Solution Six Solution Six is offline
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Yes would seem odd with that new of a car. I assumed since you lost radio stations and clock setting that you had completely lost power at some point but sounds like another issue then if you still had power to start the car.
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  #5  
Old 05-17-2010, 07:54 AM
whitedesigns whitedesigns is offline
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Quote:
I doubt battery is dead since car is an 08 with 12k miles on ODO.
The battery is approaching 3 years of age. The service manager at BMW of Asheville tells me that these batteries are good for about three years - if you get more out of them it's lucky. Mileage doesn't matter, as the battery drain is constant. If the car wasn't kept on a tender and sat for any length of time (a week or so) over the course of its life that would contribute as well.

I had a similar problem with radio presets when my battery no longer produced the necessary voltage. Based on what I've read here (and experienced personally) once the necessary voltage is not being produced, all sorts of electronic issues start to come up.

My bet? - needs new battery.
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Old 05-17-2010, 08:25 AM
Solution Six Solution Six is offline
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On a related note, does anyone know where the manufacture date is on the BMW battery? I could be blind, but I can't see a date printed on the top label. I haven't unscrewed the mount to tip it sideways yet to see if its possibly on one of the sides... but maybe its there?
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  #7  
Old 05-17-2010, 03:38 PM
bokmeipai bokmeipai is offline
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Quote:
Originally Posted by whitedesigns View Post
The battery is approaching 3 years of age. The service manager at BMW of Asheville tells me that these batteries are good for about three years - if you get more out of them it's lucky. Mileage doesn't matter, as the battery drain is constant. If the car wasn't kept on a tender and sat for any length of time (a week or so) over the course of its life that would contribute as well.

I had a similar problem with radio presets when my battery no longer produced the necessary voltage. Based on what I've read here (and experienced personally) once the necessary voltage is not being produced, all sorts of electronic issues start to come up.

My bet? - needs new battery.
Do you know if battery is under warranty?
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Old 05-17-2010, 04:18 PM
dcabot dcabot is offline
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Your dealer s/b able to help with that.
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Old 05-17-2010, 06:05 PM
bokmeipai bokmeipai is offline
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Quote:
Originally Posted by whitedesigns View Post
The battery is approaching 3 years of age. The service manager at BMW of Asheville tells me that these batteries are good for about three years - if you get more out of them it's lucky. Mileage doesn't matter, as the battery drain is constant. If the car wasn't kept on a tender and sat for any length of time (a week or so) over the course of its life that would contribute as well.

I had a similar problem with radio presets when my battery no longer produced the necessary voltage. Based on what I've read here (and experienced personally) once the necessary voltage is not being produced, all sorts of electronic issues start to come up.

My bet? - needs new battery.
The strange thing about is that since I have been driving it daily since march when weather permits I never had any problems losing stations, etc. It was only in winter when it sat for days without being started. Should I play it safe and hook up the battery tender when I go away for a week & would it overcharge battery?
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