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Deka EXT18L
Deka EXT18L
 Gratuitous RX-7 pic I took
Gratuitous RX-7 pic I took

So i’ve thought about putting in a light weight battery for awhile now and earlier this year my old battery finally gave up the ghost, so I decided to try a light weight sealed AGM racing battery. I was a bit worried about whether or not he would become problematic, so I went not with the smallest possible battery but with something just ever so slightly larger. I’ve heard of people often using the Deka EXT14 (I’ve read these are the exact battery the more pricy racing brand Braille uses) which is a 200CCA 12lbs battery. I’ve also heard that if you don’t start on the first or second try it may not work. I’ve also heard that if you let your car sit for a too long it can be a problem. So I went for the EXT18L which is a 300CCA 18lbs battery. 33% bigger and more weight seemed totally reasonable to me. After removing the original battery tray and battery I saved 22lbs! Nice savings for a mere ~$80 battery which I picked up at Battery Power Inc. (818) 896-6455 (sylmar/burbank area of LA). Installation was 3 very large heavy duty zip ties.

So 6 months later? NO PROBLEMS at all… I’ve allowed my car to sit for seven days and it had no problem starting up and I’ve also had no problems turning it over multiple times. Actually, compared to my old battery which was way past due to be replaced its been a large improvement in the available power.

The only downside in going with a battery this size is that you don’t want to leave your car keyed on with the engine off for long periods of time. Also, note you’ll need some screw on battery posts. Here is a link with some pictures, links and discussion.

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