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Battery tender suggestion?
Posted: Mon Oct 01, 2012 10:14 am
by mcahn
My son has a 2002 M Coupe which is going to spend most of the school year under a cover in our driveway. I plan to drive it once a week or so to give it some "exercise". One knowledgeable person suggested I put a battery tender on it.
BMW makes one, but it appears to go into the cigarette lighter. I presume there's no path from outside the car to the cigarette lighter without leaving a window open. I see that there are other battery tenders that attach to the battery. That'll be a bit a pain to disconnect and reconnect once a week.
Any suggestions? Will a non-BMW battery tender do any harm?
Thanks,
Matthew
Tender
Posted: Mon Oct 01, 2012 3:39 pm
by RealM3E30
Been using these for years. R
batterytender.com
Posted: Mon Oct 01, 2012 3:43 pm
by RAYADAM
BMW battery tenders now have battery clips. cigarette lighter versions are pretty much useless especially with newer beemers becuase the power supply goes away when vehicles assume full sleep.
I use my BMW tender under the hood on my 1M all the time. very easy to use.
Of course the company that makes BMW charger is the same at this website
www.batterytender.com
Re: Tender
Posted: Mon Oct 01, 2012 3:43 pm
by RAYADAM
RealM3E30 wrote:Been using these for years. R
batterytender.com
must of posted while I was typing !!!
Posted: Mon Oct 01, 2012 6:40 pm
by jtt777
This is an excellent one i have on my M3 all the time...
http://www.amazon.com/CTEK-Multi-12-Vol ... 863&sr=8-1
Posted: Mon Oct 01, 2012 6:56 pm
by mcahn
Thanks all, I'll get one of those.
Matthew
Posted: Tue Oct 02, 2012 6:19 am
by MrMCoupe
My BMW chargers have lifetime warranties. I don't know if they still do that but I would consider this before buying one. They do go bad!
Mark
Posted: Tue Oct 02, 2012 8:00 am
by BJerolimic
More than once this cheap $10 one from HF has been recommended to me:
http://www.harborfreight.com/automatic- ... 42292.html
I don't have one though
Posted: Tue Oct 02, 2012 9:42 am
by mcahn
Thanks for the additional info.
Matthew
Posted: Tue Oct 02, 2012 11:24 am
by momoboy
I also recommend the Battery Tender brand. I have 3 and they are at least 9 years old and all work perfectly. They have been dropped, rained on and one was even partially run over and they all work great. You might be able to find cheaper ones but when I am traveling and that is plugged in alone in the garage I never worry about coming home and something being burned out or shorted. Piece of mind is priceless
