Tuttio Battery 48v 21Ah 120A (burst) Bluetooth BMS

This is a one-off and I won't be making more (for science purposes). I took a healthy Tuttio pack and removed the OEM BMS then added a nice JBD 120A BMS. Now these cells and the nickel strip can barely do 120A burst so keep it more like 80-90A continuous. The BMS has temp sensors on each side of the pack touching the cells so you will see very easily how much heat your load on the cells is making (in case 80A is still too much). 

You also get a view of voltage sag and a nice view of cell health. When this pack was full the voltage diff (cell balance) was .002v which is excellent. The pack is caulked back in place inside the box and has a layer of RTV gasket maker on the inner lip where the lid overlaps. 

Here is a chance to have a nice stealth upgrade to the stock pack if you wore yours out, have bad cells, etc.