Has anyone been having any problems with the MAXX not charging? I had mine on the charger last night and it never went above 40%. Then plugged it in next to bed last night and when I took it off the charger this morning it was at 30%. On way to work I plugged it in in the car on way to work, same result now at 20%. Needless to say it is plugged in now at office and after 1 hour on charger it is still reading 20%. HELP