Ok weird idea, but an interesting one that seems like it could work.

I buy lots of batteries, I also go for long drives and deplete all of them. New batteries aren’t cheap, and I’d rather put that money toward upgrades. Now this problem didn’t occur at race day where there’s a plug right next to the track and I can cycle 2-3 batteries and drive for eternity. But out in the mountains there’s a lack of plugs in the trees sadly. Now this idea hit me.

From what I’ve read you can charge and discharge regular car batteries. What if I stuck a 1000 ah car battery in my backpack, used my chargers alligator plugs and charged my batteries as I walked? I could then return home and recharge the real car battery. I’d then be able to run infinitely on two batts. I’d also only need to carry two instead of 10+ batteries in my backpack (I go for day trips) so weight wouldn’t really change. I could also sell 8+ of them so it wouldn’t cost me anything really.

Maybe it wouldn’t work, idk. Lemme know what you guys think!