This is a 'heads-up' FYI for those of you interested in another replacement battery option for the Atom, one that will at the same time, allow you to remove some weight from your car as well.
As a motorcycle enthusiast, I subscribe to a couple of cycle magazines, one of which did a recent brief article on replacing a bike's OEM lead-acid battery with a Shorai brand lithium-iron battery. After researching the available batteries from Shorai, I found one that appears to be an excellent replacement. Here's some comparative specs:
Ariel Atom 3 Batteries
TERMINALS
FITMENT BRAND MODEL Ah CCA WT L W H L R REF $
OEM Braille B20145 20 250 14.5 lbs 7.13" 3.0" 6.54" - + $156.42
REPL Odyssey PC680 16 220 15.4 lbs 7.15" 3.0" 6.65" - + $117.28
REPL Shorai LFX18L1-BS12 18 270 2.12 lbs 5.83" 2.6" 4.13" - + $180.95
Yes, it's smaller, 12 lbs lighter, has more cold cranking amps, and a little more expensive.
I've attached some pictures of the installation in my Atom 3. I fabricated a simple bracket to utilize the original mounts. Note, I had previously installed a battery disconnect switch to resolve a problem I encountered with storing the car over the winter and the battery maintainer not working well.
Li-ion battery4_1_1.JPGLi-ion battery1_1_1.JPGLi-ion battery2_1_1.JPGLi-ion battery3_1_1.jpg
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