Nokia Lumia 925 - Charge your phone with a USB charger

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Charge your phone with a USB charger
Your battery has been partially charged at the factory, but you may need to recharge it before you

can switch the phone on for the first time.
Make sure you use a compatible USB charger to charge your phone.
1. First connect the USB cable to the charger, and plug the charger into a wall outlet, then connect

the micro-USB end of the cable to your phone.

2. When the battery is full, disconnect the charger from the phone, then from the wall outlet.

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You don't need to charge the battery for a specific length of time, and you can use the phone while

it's charging.
When you start charging a completely empty battery, the start key flashes until the screen wakes

up and the charging progress is shown.
If the battery is completely discharged, it may need to charge for up to 20 minutes before you can

use your phone. The charging indicator may not be displayed in this time.

Tip: You can use USB charging when a wall outlet is not available. Data can be transferred while

charging the device. The efficiency of USB charging power varies significantly, and it may take

a long time for charging to start and the device to start functioning.
Make sure your computer is switched on.
First connect the USB cable to the computer, then to your phone. When the battery is full, first

disconnect the USB cable from your phone, then from the computer.

The battery can be charged and discharged hundreds of times, but it will eventually wear out. When

the talk and standby times are noticeably shorter than normal, to replace the battery, take the device

to the nearest authorized service facility.