I was planning on not using my copter for a couple of weeks so I drained my batteries to about 25% to store them for that period of time. I’ve researched treatment of batteries extensively on this forum as well as consulting with our local DJI distributor and this seems consistent with the recommendation. After the ~ 2 weeks I fully charged both batteries but noticed my older one (14 charges according to the history) was down to 98% of battery life. Since I was close to 15-20 charges where a “deep cycle” was recommended, I drained this battery to 10% and fully charged it back to 100% only to find out that the battery life had dropped to 65%! What the heck happened! All cells show 4.3v and 100% charge.
I guess my question is; does anyone have any suggestions on how I can recover the battery life, and if not; is it safe to fly when the app says 100% charge but 65% battery life?
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