XS Power; they have "racing" batteries that are way more expensive, but I was looking the XV series of lightweight stock-replacement batteries: https://4xspower.com/collections/xv-automotiveThey state no more than 150A charging system, but a 6.4 Challenger/Charger has a 220A system. There's a guy w/ another Challenger 1320 who has been using one since 2021, but... 
2021 Challenger 6.4L Scat Pack 1320
100% stock: 1.680, 11.894 at 113.75 (DA 175 ft)
weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008]
pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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