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The main battery is designed so that it cannot be installed in reverse polarity. . Charge the battery only in the computer or in a battery charger designated as an approved option. . When you install the battery pack, you should hear a click when it is seated properly. . Do not expose the battery pack to fire. The battery pack could explode. Mobile Computing 105 Taking care of your battery Maintaining your battery Fully discharging your battery pack will allow better accuracy of the battery meter. To fully discharge your battery pack: . Periodically, disconnect the computer from a power source and operate it on battery power until the battery pack fully discharges. Before doing so, follow the steps below: 1 Turn off the computer’s power. 2 Disconnect the AC adaptor and turn on the computer’s power. If it does not turn on, go to step 4. 3 Operate the computer on battery power for five minutes. If the battery pack has at least five minutes of operating time, continue operating until the battery pack is fully discharged. If the battery light flashes or there is some other warning to indicate a low battery, go to step 4. 4 Connect the AC adaptor to the computer and the power cord/cable to a power outlet. The DC-IN or AC power- light should glow blue, and the battery light should glow amber to indicate that the battery pack is being charged. If the DC-IN or AC power-light indicator does not glow, power is not being supplied. Check the connections for the AC adaptor and power cord/cable. 5 Charge the battery pack until the battery light glows blue. . If you have extra battery packs, rotate their use. . If you will not be using the system for an extended period, more than one month, remove the battery pack. . If you are not going to use the computer for more than eight hours, disconnect the AC adaptor. . Store spare battery packs in a cool dry place out of direct sunlight. Mobile Computing 106 Disposing of used batteries Disposing of used batteries The life of a battery pack depends on usage. When the battery pack needs replacing, the main battery light flashes amber shortly after you have fully recharged the battery. You must discard a battery if it becomes damaged. Never attempt to dispose of a battery pack by burning or by throwing it into a fire, and never allow exposure to a heating apparatus (e.g., microwave oven). Heat can cause a battery pack to explode and/or release caustic liquid, both which may possibly cause serious injury. Always dispose of used battery packs in compliance with all applicable laws and regulations. Put insulating tape, such as cellophane tape, on the electrode during transportation to avoid a possible short circuit, fire or electric shock. Failure to do so could possibly result in serious injury. Always use the battery pack supplied as an accessory or an equivalent battery pack specified in the User's Manual. Other battery packs have different voltage and terminal polarities. Use of nonconforming battery packs co...

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