I added a second battery to my Lectric 2.0 ebike and used a battery adaptor module from Amazon. Everything worked fine for a while, but now one or the other battery and sometimes both cut out while I'm riding. I've checked the batteries and the wiring and it seems like the last piece of the puzzle is the adaptor module. Has anyone had a problem with this type of unit? Am I even on the right track? The problem is intermittent and difficult to track down. Everything is great when it's all working, but it's not always all working.