Tom B ... just another battery manufacturer out of China
Z Mann - at a guess I would say that the pack had been stored too long. You have 5 useless cells in that pack. Anything that rests below 1.0 volt will have lost a lot of runtime. I would suggest returning the pack to the store/person you purchased from
Testig is easy .... a simple voltmeter will tell you. Any cell resting below 1.0 volt is in trouble