I have a similar problem with a droid MAXX. It is clearly a software problem. After trying several chargers I tired one where the wall part glows when the phone is actually charging. Basically I have to keep plugging and unplugging the cord or rebooting the phone until the wall charger light comes on. Then the phone might charge for 5 minutes and stop charging even though the phone is only 40-60% charged. Often the lighting bolt on the phone comes on but the wall charger light does not come on. In those cases the phone wont charge. After reading many forums it is clear that this problem goes across several models and is not a wall charger or cable problem. I suspect what ever software is used to keep the battery from over charging is the problem.