I had a bad battery life initially for the past 5 months or so. But recently the battery has been good not that great.. I usually got around 7 hours but recently around 9 hours or so. I disable some background tasks and delete some apps like the Nokia Xpress browser because UC Browser is great. Disable the tap and send feature and change my lockscreen picture changer app from every 60 minutes to every 1 day. Anyways my point is it could be a background task or apps that affect battery life. I have Whatsapp, Viber, WeChat and Skype running as well.
I also charge my phone overnight when I bought the wireless charger. It is very convenient and I don't have to worry alarm not working because the battery runs out while I am sleeping. As the other posters mentioned about overcharging battery, I don't care if the battery is overcharged. This is Lumia 820. You can easily change the battery because it is user replacable unlike 920. And that is one of the reasons why I choose 820 over 920.
I also charge my phone overnight when I bought the wireless charger. It is very convenient and I don't have to worry alarm not working because the battery runs out while I am sleeping. As the other posters mentioned about overcharging battery, I don't care if the battery is overcharged. This is Lumia 820. You can easily change the battery because it is user replacable unlike 920. And that is one of the reasons why I choose 820 over 920.
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