When you first receive your device, the battery will be fully charged, but in deep sleep. To wake it, connect your device to the charger. Your device comes with a built-in rechargeable lithium-ion polymer battery. Note that you cannot access or remove the battery from your device. If you ever do need a new battery, the your wireless operator's service department will replace the battery for you. The battery will last approximately 2.5 - 3 years. If you let the battery discharge completely before re-charging, you should be able to charge the battery 300-500 times before you notice any degradation in the battery life. Read the following topics for more information about your device's battery:

• Charging Your Device's Battery
• Battery Charging Time
• Use and Standby Times
• Conserving Battery Power

Charging Your Device's Battery

It is recommended that you charge your device every day. If the device is left without a sufficient battery charge for a period of time (i.e., two days), the information contained in the device's memory (RAM) will no longer be stored on the device. Once the device is re-connected to the charger, your stored information will automatically be reloaded to the device via the service.* Note though, that if you're disconnected from the service and then the battery drains, any data you entered on the device previous to the battery's draining and after you were disconnected will be lost. Note also that if your device has completely discharged, once you attach it to the charger it may take up to 15 minutes before the screen will indicate that the device is charging. *Be aware that if your monthly bill varies with the amount of data you use (that is, you have a "per megabyte" rate plan), restoring your data to your device will count against your monthly quota, and may result in extra charges. Tip: For the fastest charging time, charge your battery in the temperature range of 0 to 40 degrees Celsius, or 32 to 104 degrees Fahrenheit. To charge the battery, do the following:

1. Attach the battery charger to your device. Locate the battery charger that came with your device. Insert the charger lead (the small round end of the adapter) into your device's power jack (the small round hole located on the right side of your device) and plug the adapter cord into a standard electrical wall outlet.
   
   While the charger is connected to your device, a lightning bolt will display over the battery icon in the title bar. Note though that if your device has completely discharged, once you attach it to the charger it may take up to 15 minutes before the screen will indicate that the device is charging.
2. Let the device charge for at least four (4) hours to ensure maximum battery life. Rest the device in a safe place and let the battery charge for at least four hours, or overnight. (To fill your battery completely, turn off your device while charging.) As the device is charging, you will see the bars in the battery icon fill repeatedly from left to right in an animated fashion. (If your device has completely discharged, once you attach it to the charger it may take up to 15 minutes before the screen will indicate that the device is charging.) When your device is fully-charged, the bars will stop moving in the full position: . Note: If your battery is fully-charged and you unplug the battery charger then connect it to the charger again, the bars in the battery icon will fill from left to right for two hours, even though it is fully-charged.

Battery Charging Time

Initial charging time for your device's lithium-ion polymer battery is approximately four hours. Recharging time is the same, depending on how discharged the battery has become. You can check how much charge is left in your battery in two places:

• Title bar: Check the battery icon ( ). The icon will show a total of five bars when fully charged. In the example shown, the battery has a 60% charge (approximately).
• Jump screen > Settings > Battery & Display screen: In the first section of the screen, you'll see an approximate measure of battery charge remaining.
  
  Read more in Battery & Display.

If your battery has become completely discharged, your device will turn off automatically. Connect your device to the battery charger and let it charge completely--for at least four (4) hours--to ensure maximum battery life. When you first connect the battery charger, the wheel on your device may flash a couple of times and it may take a few minutes for the device to come to life (if the battery was completely dead). When the device has enough power, a dialog box will appear, reminding you to keep your device connected to the battery charger and that your device will power on automatically when it has sufficient charge (about 10 minutes). Use and Standby Times With a fully-charged battery, you can use your device for one day. In power-saving (or key guard) mode, the battery should last seven days. These times are approximate however; battery operation times vary according to how you use your device, signal conditions, and other network settings made by your wireless operator. To view your battery consumption, from the Jump screen, press Menu then select Settings > Battery & Display. Note that this reading is approximate. Read more in Battery & Display. Conserving Battery Power The radio is the number one consumer of battery power. Listed below are a few ways you can save your battery power if you are unable to charge it overnight, as well as some facts about battery usage:

• Adjust the configuration of your radio. If you will not be using the wireless functionality for a period of time, you can turn the internal radio off completely: from the Jump screen, press Menu then select Controls > Wireless. On the Wireless Options screen that opens, select the Wireless Off option.
• Be careful how you carry your device. If you keep your device in a tight pocket, it is possible that one of the control buttons will be depressed. This will cause a small increase in power consumption, which will shorten your battery life.
• Use the built-in ambient light sensor to turn the backlight on only as required by light conditions. Read about selecting this option in Battery & Display.
• The battery capacity will be lower when the temperature is lower. Specifically, when the temperature is 32 degrees Fahrenheit, the battery will have 20-30% less capacity.
• When you are out of range of a base station your device will have a shorter standby time. This is caused by the radio's searching for a base station, which uses more power then if it were already registered with a base station and simply monitoring the paging channel. If you are going to be in an area or building that has no coverage for a few hours, you may want to turn off your device to conserve power.
• If you won't be using your device for a period of time, turn it off to save the most power. You can leave your device turned off and not connected to the battery charger for approximately two days before the battery will completely discharge.
• Key guard mode conserves power, but is less efficient than "off" since the screen displays the key guard image. To put your device into key guard, press and hold Done for two seconds. (To wake the device, press Menu + Done .)