hi gang i have the same problem when i updated from 8.1 to win 10 on my nokia 1520
the battery lasts a couple of minutes if u r taking vid or pics
microsoft must be aware of this problem and y they have not issued a software fix for it is beyond comprehention
it renders the phone totally useless u cannot take pics or vid for more than a couple of shots
my wife has a 1520 still using 8.1 no prob my daughter has 930 using 8. no prob
so do not update to win 10
do microsoft read these posts because it is all over the internet
iwish microsoft would weigh in on the problem
i have to take a battery back up to use it but the battery drain s in a flash
microsoft have a real prob here and can only hurt sales of there phione
lift your game microsoft
very dissapointed
ken nash