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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.
Its an AGM battery, once it gets depleted heavily this happen. Just replace it. The factory batteries are made by exide or varta so just seek out a same spec replacement from those brands
I use Deka sealed batteries so less offgassing messing up terminals.
Got a new Exide battery at our expense outside. Car is fine ever since then.
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.
Just replaced battery as EV had stopped working, and the battery dealer said it was. Good battery for hyrbids (Exide X40DPMF)
Ära Exide akusid osta, need hunnik sitta. Varta akud on okeid. Kui autol on start-stop süsteem siis peab kindlasti vaatama kas autol on EFB või AGM tüüpi aku ja vahetama sama tüüpi aku vastu.
its surely a dead battery, the fuckall exide batteries that they give are dogshit. had the same issue some days ago, thankfully the bike was covered under warranty.
im honestly thinking of changing the battery to a better one.
Same shit keeps happening with my N250 for some reason, the starter relay just does the "tk tk" sound but bike doesnt start, Service centre said the factory battery was faulty, so bought a new Exide battery and everything was perfect for 1.5 months.
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If choosing battery across many manufacturers, check the part ranking. If your choice is down to two brands, the PartReview part comparisons help.
We compare battery across these categories:
In March 2026 on PartReview, battery Deka were overall better than Exide.
Battery Exide and Deka were equally popular according to data in March 2026.
By vote balance, battery Deka surpassed Exide:
By number of reviews, battery Exide surpassed Deka:
In March 2026, according to PartReview, battery Exide and Deka have not taken top places in car-specific ratings. You can help by adding your review about these manufacturers.
If this comparison didn’t fully answer your question, there are many others on PartReview.
For example, comparisons of battery Exide with: OPTIMA, Varta, Bosch, OEM Subaru, OEM Volkswagen, YUASA, Tesla, Duralast, OEM BMW, ODYSSEY.
Also available: comparisons of battery Deka with: OPTIMA, Varta, Bosch, OEM Subaru, OEM Volkswagen, YUASA, Tesla, Duralast, OEM BMW, ODYSSEY.
You can also see who is better among other battery manufacturers: OPTIMA or Varta, OPTIMA or Bosch, OPTIMA or OEM Subaru, OPTIMA or OEM Volkswagen, OPTIMA or YUASA.