I'm still disappointed that the Simplo guys are fine (colleague's Pro3 is fine), whereas us LG battery has our Pro3 utterly useless.
I have the Simplo battery and my SP3 is not fine! My SP3 is almost 100% dead. It will not stay powered on even with the AC adapter plugged in (and I've tried multiple adapters). It powers on for a short time, then dies without warning. Tried all MS "suggestions" and nothing changed. I'm so embarrassed by this device because I've spent so much money for the i7 version and it lasted two years under very gentle use and now seems like complete garbage with no support from MS. The words "utter disappointment" now comes to mind every time someone mentions a Surface Pro to me!