I have an assortment of lithium batteries. Ranging from 12v 90amp, 60amp and 50amp. These have bms built in. I also have a large number of 3.3v 100amp cells. I used these to build out several 48v 400amp banks to power my cabin. Im selling these in groups of 4. So you get 4 3.3v to make 1 12v 100amp battery. $60 each for any battery. But I'll do a discount for 10 or more. These are batteries out of portable power banks which didn't meet 100% duty. Ive been using them for 5 years to power my cabin. And most where spares that I never used. Because I have so many.