Re: what's the difference- battery pull with charger in
I would suggest not leaving the power connected and pulling the battery. You always run the possibility of surging the phone. It may not cause issues in most cases but good electronics practices always suggest power be off during any battery insert.
The LED lite goes out slow due to capacitor discharge.
As for the reboot, the OS reloads in both methods the same.
Z10 on BES
Z10 on BIS