When you start charging a completely empty battery, the start key flashes until the screen wakes up and the charging progress is shown (may take up to 20 minutes).
- What can I do to free up the phone memory on my Lumia?
- Why does my Nokia Lumia automatically switch on when it is charging?
- Can I change the Windows Phone Store country on my Nokia Lumia phone?
- Why should I update my Nokia Lumia phone software?
- Why does my Nokia Lumia show different charging status of the battery on the Glance than on the Lock and elsewhere in active device state?