A simple hunt using the Search Tab, turned up these informative posts
in about 2 mins:
http://www.xoutpost.com/x5-e53-forum/...Battery+brands
As noted in above post, there are many brands, and their availability will
vary by your location...fwiw, I'm not a huge fan of Optima, but choose
what you like. Also, a ~$50 Battery Tender, connected under your hood
when you car is sitting, should keep your new battery up to full charge
regardless of temps.
Battery Tender & Hookup:
Batt. Tender:
http://www.batterytender.com/
Battery Hookup, with or w/o self-timer:
http://www.xoutpost.com/x5-e53-forum/...-term-car.html
And, a DIY install thread...it's cake:
http://www.xoutpost.com/x5-e53-forum/...apped-out.html
Hope this info helps...this board has a good answer(s) or, at the least,
very good opins and info on nearly any topic under the sun. Search Tab
is your friend.
GL,mD
I was bored this am...5 mins of "research" turned up all this stuff. I need
a new fookin hobby...