12s 44.4v 14ah 621w module (13s with 1 bad cell)

This module is a 13s 48v 14ah module that has 1 cell that was discharged by the BMS. The first 12 cells in series work perfectly. They are prismatic cells inside. So you essentially get 12 3.7v 14ah cells for $6 each. Just keep the battery as is and add your own 12s BMS or even make a 36v battery by adding a 10s bms and leaving off the last 3 cells in the pack. At this price you can't go wrong. 

The module weighs 12 pounds and measures 10" x 3" x 5.5". The cells are at least 2c rated so figure 28 amps of discharge is perfect but likely can handle 3-5c.