Project Evo IX had a dead battery. Our car had been in storage for a couple of years which killed the lightweight Braille Battery AGM battery we had installed in the car years ago. Our old discontinued Braille Gell Cell lead-acid battery was as dead as a door nail from sitting for years. It weighed just under 12 lbs. This was a good decrease from our stock battery which weighed 41 lbs. This battery worked exceedingly well, perhaps its only drawback was its 14 amp-hour capacity which caused the car’s dark current draw to drain it in about 3 weeks of sitting unless it had a battery tender on it which was no big deal. However, at some point in storage, I removed the battery tender for the car and it sat for a long time with no charger at all. Completely discharging a conventional battery and letting it sit for a long time is the worst thing you can do to a conventional battery.
We called our friends over at Braille to get a replacement. We figured getting a replacement from Braille would be the easiest solution since we had previously installed one of their battery mounts in the trunk of the Evo for . Here is our new Braille Lithium battery on the right vs our old discontinued AGM battery on the left.
The notch on top of the batteries is used for the Braille battery mount, which will work on the old battery and new battery. This means our existing Braille mount can be easily modified to fit and we can enjoy all the performance benefits of Braille’s new Lithium battery technology. Although the new battery is bigger, it is much lighter!
Our poor dead AGM Braille Battery weighed in at 11.95 lbs on our scale. This still saved a lot of weight over the 41 lb stock battery. We had also moved the battery from the front of the car to the back trunk which changed the car’s weight distribution by a whole percentage point, this was a huge difference.
We replaced the old AGM battery with something that would take advantage of the improvements in car battery technology over the years. We selected a Braille Green Lite G20 battery which uses lithium chemistry. The G20 only weighs 5.8 lbs (Braille claims 4.5 lbs but heck at this weight who cares!) It has 697 cranking amps and a capacity of 36 amp-hours. It can also withstand 5,000 charge cycles. Braille rates the G20 as appropriate for 4-6 cylinder engines and even high compression race engines. This is a significantly better performance than our old battery at half the weight! It is mind-blowing that this tiny, super lightweight battery can have so much power!
Our old battery had about the equivalent performance to the very popular classic race car battery, the Odyssey PC680. The PC680 weighs 15.4 lbs, has 520 cranking amps, 16 amp-hours of capacity and has a 400 cycle life. The Braille G20 blows it out of the water and is almost 3x lighter!
The Braille battery has a lot of flexibility in mounting via the terminal connection. You can do a post or an eyelet terminal configuration as well as a top or side mount or any combination of the two. Here is what the post adaptor looks like. You can put it into either hole in the terminal block. We used eyelet terminals for our application.