Microsoft Corporation NHP-2AX 사용자 설명서

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time a phone is used for calls will affect its standby time.  Likewise, the 
amount of time that the phone is turned on and in standby mode will 
affect its talk time. 

Your phone is powered by a rechargeable battery.

Note that a new battery's full performance is achieved only after two or 
three complete charge and discharge cycles!

The battery can be charged and discharged hundreds of times but it will 
eventually wear out. When the operating time (talk-time and standby 
time) is noticeably shorter than normal, it is time to buy a new battery.

Use only batteries approved by the phone manufacturer and recharge 
your battery only with the chargers approved by the manufacturer. 
Unplug the charger when not in use. Do not leave the battery connected 
to a charger for longer than 72 hours, since overcharging may shorten its 
lifetime. If left unused, a fully charged battery will discharge over time.

Temperature extremes can affect the ability of your battery to charge. 
Battery will not charge at temperatures above 140°F (60°C).

Check the model number of any charger before use with this device. This 
device is intended for use when supplied with power from the devices 
listed on the following pages.

Warning: Use only batteries, chargers, and accessories approved 
by Nokia for use with this particular phone model. The use of any 
other types may invalidate any approval or warranty applying to 
the phone and may be dangerous.

For availability of approved accessories, please check with your dealer.

When you disconnect the power cord of any accessory, grasp and pull the 
plug, not the cord.