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Light Weight Batteries

Old 12-04-2018, 06:05 AM
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Originally Posted by vcoil View Post
I have replaced the OEM battery with a Deka for Harley Davidson in the engine bay (-10kg).
No problems with engine bay temps or cranking (I don't live in Texas, NA engine with OEM runners).
The only thing to avoid is the battery fully discharge (i.e. in winter time) by using a battery charger/maintainer (like any gel battery) : if not you are ready for a battery replacement.
My car is not a daily driving one.
Presently there is not AC, nor alarm system but this modification has been made when the car were not that "extreme".
MTBF 2y without charger-mainainer, 3+(since the last replacement is the same) with.
This mod is not intended for cars exposed to cold winter temps for long times (i.e. parking the car outside at -10C for hours).

Best regards
I am also using the Deka ETX20L now. great little battery, and braille has a nice hold-down bracket that can be used to relocate to the trunk.
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Old 12-04-2018, 08:06 AM
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I'm using a 480 CCA version of this LiFePO4 battery from Bioenno Power (~4.4 lbs) mounted in my trunk. It works perfectly above 45-ishF but struggles below that temp. Honestly, I think they may have mixed up "CA" with "CCA". I swap it for a cheap lead-acid battery in the winter and bring the LiFePO4 in the house (never charge a lithium battery below 32F).

If you go with them, I'd recommend one of their 625 CCA or greater batteries. I think Mr. Pockets has their 1250 CCA battery and loves it.
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Old 12-04-2018, 06:55 PM
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I have a 15# Braile with mounting bracket I'll let go for cheap if anyone is interested (see it in my build thread). It struggles with a series 2 starter but is fine with series 1.

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Old 02-21-2019, 02:00 PM
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Originally Posted by hufflepuff View Post
I use a U1R tractor battery. I've used this battery in 3 other cars as well for multiple seasons. Starts fine down in the 30F range. weighs about 18ish pounds. and very cheap.
need to remember this when its time for my next battery

Last edited by Nadrealista; 04-02-2019 at 02:14 PM.
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Old 02-21-2019, 04:00 PM
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Downside with the U1R is it's still a flooded-cell battery. It can leak battery acid on the track and wreak havoc on the metal around the tray. Not as big a deal on the '8 as it was on the FD or SA22C, but I'd rather not have to think about it.

USA-made Deka ETX-30L AGM can be had for $95 delivered. It will easily last 7-8 years with proper use of a maintainer. Not as light as a U1R (+5 lb), but lasts longer, full starting power, and I never have to think about it.

I do use a U1R in my Honda Insight. Literally $20 at Wallyworld versus $120 for even the cheapest "correct" battery.

$95 Deka link:!21224!US!-1
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Old 04-02-2019, 02:15 PM
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will be on Dominion this Sunday (april 7th), are you around?
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