vs
Battery Deka or OEM BMW
Fall 2016 Update: I just installed a new battery. It is a Deka Group 47 AGM. Cost was about 135$ at Battery Mart, 20$ more than the standard battery the store offered. It is odd in that the carry handle is square to the battery length. The specs say it weights 37-1/2 lbs. 600 CCA at 0 F. Two minor things: The battery foot flange is not thick enough to match the battery holding channel or the holding clamp. Some sort of wedge needs to be used. There are probably height adapters or spacers sold for that. Second, the hood release cable will need to run on top of the battery corner, unless you slide the battery out toward the radiator more than I want to.
Pros: 600 CCA at 0 F
Cons: wedge needs to be used
I've been buying Deka batteries for awhile now and they have been great to me as a customer.
Pros: great customer experience
I just ordered a Deka EXT20L, from what ive read everyone loves it. At $87 from Lowes its worth the gamble. Its a sealed AGM battery so it can be mounted anywhere, ill be putting it under the rear seat.
Pros: everyone loves it, sealed AGM
Part number: EXT20L
I have personal experience with with both battery technology and the litium ones put the conventional small battery to shame. If I left my car with the small Deka that's in it for a few weeks without starting, or turning off the cut-off switch, the alarm and small draw I have from a wacky door switch would completely drain it.
Pros: lithium ones better
Cons: drains quickly
I am still on my original battery in my 2007 335i w/ 87k miles.
Pros: original battery, 87k miles
Vehicle:
BMW
Mileage: 139200 km
My current dead battery is a Deka - lasted 3.5 yrs, can't complain.
Pros: lasted 3.5 years
Me too. Using a Deka ETX20 right now. Scooped it for $85 shipped from Tri-State Battery. I just got my car back on the road, so I haven't seen how well it holds its charge without running the car every day though.
Part number: ETX20
Great thread. I have used lightweight batteries in all of my builds. Dont buy Braille or any high end BS. They are all rebranded Deka. Ended up grabbing a etx14 power sports battery from autoquest for $70. Same as the Deka ext14 just rebranded.
Pros: works like a charm
Part number: ETX14
Just use a Deka ETX20L. I think they're 15 pounds or so and they're cheap and widely available. Mine seem to last about 2-3 years, although they usually die from me forgetting to turn the headlights off. I was able to recharge my last one using a wall charger and I squeezed another 6 months out of it before finally replacing it.
Pros: cheap, widely available
Cons: last about 2-3 years
Part number: ETX-20L
Switched to a stock mk5 4cyl battery though as the Deka couldn't handle sitting for more than a couple days without being on a trickle charger.
Cons: couldn't handle sitting
Vehicle:
Volkswagen Golf
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