My left ear bud completely stopped working. Right side charges fine, left shows 0 percent charge. When I used them last both were about 70 percent, now 3 days later right is 100 percent, left shows 0. If i Take them out of the case right charges, left charges briefly, then get a green light.
Take the right one out, then keep moving the left one until it starts to charge. You may have to do this several times. I just had this same issue, finally it started to charge.