Ironworks 1240st 12.8v 44ah 573wh - Needs BMS

These batteries are balanced but the BMS is not working. We have 4s lifepo4 BMS units that will work for these batteries. We cut open each battery and confirmed all the cells have good voltage and are balanced. The issue is just the BMS. You can also top balance multiple batteries and put them in series, then add one overall BMS for whatever voltage you want. Or use them to recover the cylindrical cells inside and build something else out of them. Nice value overall and the 4s BMS units are cheap.

These are popular batteries that were used in hospital medical carts.

Dimensions: 7.75" wide, 4.75" deep, 7" tall.

Weight: 13 lbs.

Can be charged up to 20a.

Discharge up to 40a.