Exactly my experience with i7 SP4. Even using the SP3 dock, the SP4 slowly drains under heavy use, then won't recharge without a complete shutdown. Or worse -- today only a 2-button restart would get it to charge.
Already tried reinstalling the battery driver. Headed to the MS store for the SP4 dock, but given it has the same power rating as the 3's, I'm not optimistic.
I could tolerate the slow drain if it would recharge afterwards, but it just sits there "plugged in, not charging" after the heavy work is done.
Having the very same issue with my SP4-i7 and Galaxy S6. With both devices plugged in NEITHER can steadily charge and keep going "on battery" The list of compromises keeps growing as does my buyers remorse!
I believe the sp4 dock has a 90w charger. So the sp4 should be able to charge and run at full load at the same time with this adapter.
Unless of course, the Surface itself is limited to only draw so much power from the adapter.
Interesting occurrence with my SP4 i7 16G, on SP4 dock.
Yesterday I left it with an intensive Premiere render. It's handled harder tasks with no problem -- when powered by the dock. This morning, the render is done and everything's fine, except "54% available plugged in not charging."
Only Premiere Pro running. No crashes, no power failure. It was 100% about 1/2 hour before I left.
I'm concerned this may point to SP4 dock not being able to keep up either. And the "not charging" thing may still be there, masked by a beefier power supply. But it's been fine on the dock; I could certainly be overlooking something.
Restart doesn't trigger charging. Nor does shutdown with a break and two-finger start-up. It seems stuck at "54% available plugged in not charging." Anyone have thoughts on this?