Indi Reactor 20 Discharging to only 7.5?? why???
I would like to know what method you are using to make this observation?
If you put a Meter on the Pack AFTER it had discharged, the Cells will have recovered and have a surface charge around 7.2+ volts. Put any type of load on the Pack and the voltage will drop immediately.
You need to have a Meter connected in Parallel to the Pack DURING Discharge if you want to verify the voltage cutoff point.