Similarly disappointed with the Fullriver LiFe.
Preliminary iMax cycle test (3.6V >> 2.0V) proved out near 2000mAh. (3.65V is recommended charge)
Experimented with LiFe charge 3.6V >> LiIo discharge 3.0V with poor results.
Accidentally ran a cycle at LiIo 3.0V >> 4.10 and got 3000+ mAh!
......... LiFePO4 Capacity "Map" Test
Will connect as 4s20p for cycle testing via inverter, through VAWAh meter.
Cycling cells multiple times might enhance-stabilize capacity-performance?
Will allow differing charge-discharge rates and voltages.
Will bulk charge with MeanWell and monitor banks with 6s volt meter.