Needs BMS - Power Sonic 12v 45ah 576wh PSL-12450 - $122/kWh

This battery is confirmed to be balanced but the BMS is not working. It was recovered from a medical computer cart. You can easily swap the BMS because the connections are right there under the lid. You can remove the lid with a regular phillips head screw driver. There are 6 bolts holding the lid on. The balance leads and the main connectors are right there so this is an easy BMS swap. We have 30a BMS units that are 4s lifepo4 that will work just fine. Simply unbolt the old BMS and add the new one. You will need 1 small jumper wire to reconnect the positive post and connecting to the B- and C- on the BMS should be very simple. Here is your chance to get a great deal.

Specs are in the 2nd and 3rd photos.