I knew these 5S lipos I ran on 10S were a little damaged. But still the result is surprising. One falls a bit short compared to the other but until it does, it holds about the same voltage under load than the other. Pretty good despite what they went through

Both lipos charge with no problems and all the cells end up perfectly balanced at 4.205 V.
FlightMax 3000 5S #1 (in black)
Discharge rate: 5.90 A
Starting voltage: 20.82 V
Ending Voltage: 15.00 V
Total Time: 27 min. 51 sec.
Tested Capacity: 2736 mah
FlightMax 3000 5S #2 (in red)
Discharge rate: 5.90 A
Starting voltage: 20.85 V
Ending Voltage: 15.00 V
Total Time: 30 min. 27 sec.
Tested Capacity: 2991 mah