I have tried it with 3 different Apple chargers and gave same problem. I bought a reconditioned series 4 and it would do this so much it was difficult to get to 50%. I returned and got a new series 5 and it still does it though not nearly as much. It does fine till it reaches about 75% and then starts cycling off and on with the charging. It does reach 100%. Does it do this to protect the battery (like the iPhone “learns” your schedule) so as to not overcharge?
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