See post down below regarding the problem.
I recently got a GW6900 and modded it, and I had to take the module out to do a negative display mod, and I got new straps, a DW 6900MS strap, which I waited two weeks for. I left the module in my drawer for that time, and when I got around to finishing my mod, it was still on high. I wore it for about two days, then left it in my drawer again, and now it's on medium. Are the solar panels supposed to be somehow connected to the module? Thanks.