I bought fresh Tattu 3S 75C 450mah lipos 4 months ago from Tattu’s website for my micro quadcopter. My micro quadcopter has a burst amps of 20A and a continuous flying amps between 4 and 8A. I cycle six lipos per flying session, parallel charge at 1C, and put them to storage charge at the end of the day (3.8V). Each lipo has 26 flights on them.
My FC has a current sensor and I land after 420mah are used. Around flight 20 my resting voltage after I land was 3.74V per cell. Now, after flight 26 my resting voltage after I land is only 3.7V per cell.
Are my lipos dying already?!? Do current sensors drift so I need to recalibrate? Am I doing something wrong in my charging process?
I really thought Tattu would last longer…