@LevetechBattery replacement did not work for me. Had the same issue. Ended up having to exchange the fixed and replaced battery ones with new ones - one of which (brand new) had the issue. Seems to me this is a combination of a charging problem and firmware problem. The fact that I eventually got them to charge to 100% indicates as such, it is not an individual unit problem.
@barbs974Sometimes it won't work the first time. I have had to try it in some cases, two or three times. But for me at least it has worked eventually every time.