My 6+ came with battery bad right out of the box. No lights on battery and charger shows as green or charged.  After several attempts to contact by phone and waiting an hour each time and also leaving a number for call back, all this over the course of 3 days, I finally got through and was asked to take pics and videos of the battery, charger and charger plugged in. 2 days after providing that information I received a "congratulations" your replacement battery was approved.  That was August 4th.  The battery has still not shipped. 

I bought two RAD rover bikes 4 years ago and they have worked very well but the more I look and read about their semi-integrated battery issues the more I wish I went with another brand.