I just bought a Earthx lithium iron phosphate battery. So far it's great. It has a battery management system and is the first liFePo4 battery approved by the FAA. Also just won Indy this year in the Penske car. Also, it only weights 4.9lbs ,is 6.5x6.6x3" and is local.
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And fits inside a fake battery box I made
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