Chances for those cells perform equal, are very low. The result is that at least one cell is under heavy stress, since it dump before the others. And then the pack will die very fast.....
Replace with a equivalent cell, then you'll get a much better result.
Schumacher Mi5 - Sanwa MT-4 / RX-462 / KO Propo PDS-2123 - Nosram 5600 X-treme Saddle Pack - LRP SPX Zero/X12 17,5 - Nosram Stealth Touch Evolution - MAAS SPS 9250