These batteries were recovered from slightly used modules with laser welded connections. Only a few left at the moment.

At this price, if you are comfortable welding aluminum tabs or have a laser welder this is a great deal. We get asked about being able to tap and die into the studs and the answer is these cells have a tab that is roughly 10mm thick but of course you don’t want to go that deep if you do try that. We obviously can’t recommend doing this but if you want to give it a try at your own risk maybe limit the depth of your thread to 6mm or less.

These batteries have cells that are perfectly balanced but they need a BMS. We cut each lid open so you have easy access to the cells inside with the balance leads. The most common issue is the BMS bluetooth locked out the BMS on a lot of them. So all 4 cells will be well balanced and have good voltage. Just have to add a BMS. All of these batteries can be series connected into 24v, 36v, or 48v then you can just add 1 overall BMS.

These batteries have never been used, have a built-in 80a BMS, and came in the original pallet. They are all resting at nominal voltage. The brand names have all been removed so these batteries are unbranded but the batteries are unused and will work like new.

These batteries have balanced cells but just need a new BMS. The BMS units are not working. We cut open each battery and checked the cells to make sure they all have good voltage and are balanced. 4s lifepo4 BMS units are very cheap and we have them here on our website. The 30a BMS units would be nice to add to these and very easy since the balance lead wires are accessible.

Every battery is fully tested and comes with the printout of the test report which shows the capacity and charge/discharge graph. You can select the tested capacity in the drop down menu.

These batteries still have the cables attached. They can be series connected up to 48v as well. A high quality, medical grade BMS is already built in.