vs
Battery Deka or Duralast
You can get an Deka AUX18L from batterymart.com for $159 shipped to your door. Deka is the OE manufacturer of the BMW battery for the i3. My original battery lasted 7 years, it’s a no-brainer.
Pros: lasted 7 years
Vehicle:
BMW
Part number: AUX18L
You need this one, and it takes about 10 minutes to install. Just hop into the front trunk, unbolt the bar from the firewall that braces the battery -- iirc 13mm. Remove the tire inflator and the box (pulls right out), remove the other bolt, unscrew the two terminals (10mm probably), swap batteries. Done.
Pros: easy to install, 10 minutes
Vehicle:
Porsche Cayman
These parts are New. Battery duralast gold
Pros: New battery
I use Deka sealed batteries so less offgassing messing up terminals.
Pros: less offgassing
Cons: messing up terminals
Duralast AGM. No leaking, minimal to no corrosion, god life, decent power, and most importantly it was readily available.
Pros: no leaking, decent power
I only use deka on my service rig. Usa made quality. Though listed at 540 CCA, MY Midtronics tester shows they output 650 - 750 CCA.. I easily get 7 years use in the field with these.
Pros: USA made quality, high CCA output, long lifespan
Deka batteries. I’ve turned wrenches for twenty years and they’re the only ones that still consistently test far above their rated capacity when new. I have one that’s 7 years old and just installed one in my other rig last year.
Pros: above rated capacity, long lifespan
Just had a 5yo Napa battery die, put a new Duralast Platinum Elite in there, back to running normal except 2 things: 1/ Random engine fan activation seems to be what killed the previous battery. Still happening.
Pros: back to running normal
Cons: random fan activation, battery died
Vehicle:
Volkswagen Golf
Duralast is almost always johnson controls, made in mexico.
Last December, the OEM battery died and I replaced it with a new Duralast battery from AutoZone. Fast forward to today, the car wouldn\u2019t start at all. Had to jump it just to get it running and drove straight to AutoZone to get it tested.\n\nBattery tested good. Starter tested good.\nBut the alternator failed, specifically the charging current test.
Cons: alternator failed charging test
Vehicle:
Mazda
Mileage: 31000 km
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