151 vote
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.
I use Deka sealed batteries so less offgassing messing up terminals.
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.
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.
UPdate - new battery and bluetooth 12v monitor installed last Monday night, all good since then including one day with 40 miles of driving and recharging in weather well below freezing (16 to 28 F), but I happen to be mostly driving other cars the rest of the time since.
FYI, altho I ordered from Remy, the sticker on the battery I received says [Deka Intimidator EHP](https://remybattery.com/batteries/brand/deka-intimidator-batteries.html?srsltid=AfmBOorxsFi7eoMbizQPDMsF1q-32WuvMxLPyiLSgftX8ExWmqHWSfq4). IDK if there's any functional difference - it seems to have the exact same terminal connections as the OEM BMW battery it replaced.
Also FWIW, despite no indicator on the shipping box for 'this side up' and it clearly getting Ace-Ventura'd around by FedEx, it did not leak or show any signs of damage inside the shipping box. It was well padded with foam made to fit the battery and fill the entire shipping box. So far I'm happy and the car seems to be too.
OEM for Harley. I've replaced several with an average lifespan of 5 yrs at 20%+ cheaper than Harley branded
As a harley tech I see more aftermarket batteries fail then I see oem ones fail. There are a few good aftermarkets like DEKA but for the most part aftermarket batteries seem to fail quicker then oem.
Deka. Solid battery.
My Mechanic had me get non-AGM style from Deka. I have the dual battery setup, and have drained my spare a few times already and it’s out performed the previous brands.
I really like the Deka ETX12. Point is these batteries are bulletproof. They last longer than any other battery I have ever gotten. I highly recommend them.
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The brand is registered in USA. Official website: https://www.eastpennmanufacturing.com/.
In March 2026, PartReview users have a positive opinion of Deka battery.
PR Score — 94 out of 100, based on 50 reviews and 151 vote. 47 positive reviews, 1 neutral review, 2 negative reviews. Average rating — 4.4 (out of 5). Vote balance: 143 up, 8 down.
In the ranking of the best battery this part is at position 3, behind Varta and OPTIMA , but ahead of YUASA and OEM Volkswagen.
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See which car brands and models owners choose Deka battery for. Below are car-specific ratings where this part is in the Top-3:
There are 27 comparisons of Deka battery with other manufacturers on PartReview.
In particular, see which battery are better: Deka or OEM Audi, OEM Chevrolet or Deka, OEM Hyundai or Deka, Deka or OEM Mercedes, Deka or Duralast .
