Many Apple devices, like the iPad, ship with sufficient power to run them for any short while. But as you poke and prod your new iPad, that charge won't last long, so you'll want to get the iPad connected to a power source to refill its battery properly. You can charge your 'Pad in one, or possibly two, ways:
Charge by AC adapter. Look! Another charger for your collection! Your iPad has a square little 10-watt AC adapter prepared to keep your tablet charged. It has a USB port on one side, and a plug on the other. To enhance your battery, plug the flat end from the iPad's USB cable into the cube's USB port. Then plug the cube's pronged end into an electrical outlet. Hitch up the Dock Connector side of the USB cable to the bottom of your iPad and charge away.
Charge by computer. Unlike iPods and iPhones, charging the iPad over your computer's USB port is not a sure thing anymore. While USB ports on some newer computers - like late-model iMacs - have sufficient juice, many older ones don't. To determine for sure, grab the USB cable and plug your iPad into your PC or Mac's USB port. If you visit a "Not Charging" message in the top corner of your iPad, you know your port is underpowered.
It takes only a few hours to fully gas up your iPad's battery. Whenever you plug it in, the iPad displays a translucent battery that fills track of green power. A smaller, black-and-white battery icon up in the iPad's status bar displays a lightning bolt, and also a percentage of the battery's current charge.
The iPad is fully charged when the battery icon in the menu bar shows 100%. Apple says a full battery charge lasts as much as 10 hours for web browsing, videos, and listening to music. Your results may vary.
Don't expose your iPad to extreme cold or hot temperatures - keep it between 32 and 95 degrees Fahrenheit. Use your iPad regularly. And be sure to charge it a minimum of once a month to keep that battery chemistry peppy. Place the iPad to sleep to save power.
Take the iPad from any heat-trapping cases before you charge it up. Dim the screen when you don't need it at total brightness. If you notice the Low Battery icon or message, plug your iPad into an electrical outlet using the AC adapter.
The iPad battery indicator shows roughly how much charge the battery has left. Features like the music equalizer - or jumping around within your media library - can drain your battery faster, just like using big, uncompressed file formats, like AIFF.
That wireless chip inside the iPad saps power even if you're not trawling the Web. Save energy by turning them back when you don't need it; visit Settings, then Wi-Fi and tap Off.
Lower the regularity with which you check email or have data pushed to the iPad from the Internet in order to save some energy as well - make those adjustments at Settings, then Mail, Contacts, Calendars. Bluetooth and Location Services also take their toll, and you can turn them off by going to the Settings icon.
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