vs
Battery Deka or OEM Mercedes
Reviews
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
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
In sum, I can fully recommend the Deka ETX30L battery for long-term and continuous use in our cars.
Pros: long-term, continuous use
Vehicle:
Porsche
Part number: ETX30L
I have some extended experience with a lightweight battery in my daily driven 2006 Boxster S, which is well known for the demands it places on the battery. In spite of that, I successfully used the Deka ETX30L (21 lbs.) for almost 3.5 years.
Pros: reliable lightweight battery
Cons: trickle charger needed
Vehicle:
Porsche
Part number: ETX30L
EDIT: Confirmed fitment (duh) and ordered the Deka through Batteries Plus. This battery seems to be best fit as its reserve capacity is nearly double that of the Optimas.
Pros: best fit, high capacity
I've dealt with this issue on both of my newer AMG vehicles. My older ones never had this problem. From my understanding, this is caused by the new mbux system being a bit of a power hog. I eventually had to invest in a trickle charger, and I have to charge both of my AMGs 3-4 times per year. It gets worse as your battery gets toward the end of its lifespan.
Cons: power hog, frequent charging needed, issue worsens
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