Recently I've updated my Sony Z1 Compact to Lollipop and noticed that battery is drained much faster than it was in KitKat.

~50% of battery usage is by builtin E-Mail app, here are the stats:

email stats

I have two e-mail accounts with following settings:

  • Check frequency -- Every 10 mins
  • Days to sync -- 30 days

It also overconsumes traffic - it receives about 7-10 Mb per day even if I don't have new emails. E-Mail server is IMAP w/SSL, but not Exchange, and both accounts are pretty big (about 4-5k e-mails). Usually, I've disable Wi-Fi. BTW, firmware is not rooted.

Any ideas what it receiving so eagerly, and how to stop it doing that?

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