Battery drains overnight on standby

Yes buddy.it is happening to me also.i have Lumia 520.same battery capacity.I think u r using win 8.1 dev. preview. It will be solved in win 8.1 official version.
 
Yes buddy.it is happening to me also.i have Lumia 520.same battery capacity.I think u r using win 8.1 dev. preview. It will be solved in win 8.1 official version.

My Lumia 520 doesn't drain that much but my Lumia 525 does. And battery drain is more if I keep it on WiFi as compared to cellular data.
 
Just switch wifi and cellular data off.bcoz I will drain your battery at the rate of 3% every hour.don't switch wifi and cellular data on while u sleep at night.ur battery life will improve.
 
Just switch wifi and cellular data off.bcoz I will drain your battery at the rate of 3% every hour.don't switch wifi and cellular data on while u sleep at night.ur battery life will improve.
But the point is battery should not drain that much in the first place and that too on standby.
 
Yes,all win 8.1 dev. preview users have that problem including me.dont worry.it will be solved in the official version.
 
Updated my Lumia 1520 yesterday and the battery is working fine. It only drained 5% while I was asleep. That's for about 7 hours.