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The iPhone and iPod touch both have large internal batteries that cannot be removed. This means that, unlike with most other mobile phones, you can't have a spare battery charging on the side to swap in when the one in your phone or iPod becomes depleted. Managing battery life is an especially important part of owning an iPhone or iPod touch, probably more so with the iPhone since it's your phone, but if you count on your iPod touch to check your email, having a dead battery can be just as much of an inconvenience. In the chapter on troubleshooting I'll cover several techniques on extending the charge of your battery, but here I just want to make sure you understand the options for charging your iPhone or iPod touch.
The iPhone comes with a USB cable for connecting to your computer as well as a power adapter for charging your phone from a regular wall outlet. As I've mentioned earlier the iPhone 5 and fifth generation iPod touch uses the new Lightning Connector. So they're not compatible with the older dock connector cables used by previous iPhone and iPod touch models. The iPhone and iPod touch both come with their compatible cables regardless of the model. The iPod touch does not come with a power adapter. So, initially you can only charge your iPod touch by plugging it into your computer, but you can purchase one of these adapters from Apple or something similar from a third-party vendor.
So you can charge your device either by plugging it into your computer with the included cable and with most computers, their USB ports will continue to charge your device even if the computer is in sleep mode. But you'll get a quicker complete charge with a power adapter plugged into a wall outlet. When you unlock your phone the battery indicator in the upper right corner shows a little lightning bolt symbol indicating the phone is charging. Once the phone reachers a full charge, the bolt changes to a plug icon indicating the charge is complete, but that it knows it's still plugged into a power source.
Your iPhone and iPod touch will warn you if your battery level is getting so low that your device will no longer function. First, you'll see a message saying that your battery life is at about 20 percent and you'll get a similar message when it reaches about 10 percent. That's your cue to plug in your device as soon as possible. Finally, when there's just no power left, the device will shut off and be unusable until you plug it in. In cases of extreme depletion you won't even be able to use the phone while it's plugged into a power source until its charge level comes up to a usable level.
You can get a more accurate read on your battery level by going into Settings>General>Usage, and turning Battery Percentage On. This gives you a percentage display next to your battery icon. Again with no removable or user-replaceable battery it's important to have the basic tools to keep your iPhone or iPod touch charged. Many people keep an extra charger on their nightstand and let their phone charge overnight, which might be all you need unless you're using a device heavily during the day. In addition to having an extra charger for the nightstand, you should probably also pick up one of the many available chargers for you car.
I like adapters like this one that has a USB port in it so I can charge a variety of devices and I don't have to have a car charger specifically for my iPhone. You may even want to look into an accessory like an external battery pack. Many manufactures make batteries that plug directly into the iPhone or iPod touch's connector and you can even find cases with batteries built in, which I think are especially nice, so you don't have something hanging out of your phone that you might accidentally snap off. And some models can actually double your usage time. As you spend more time with your iPhone or iPod touch you'll get a better idea of how often you need to charge it.
It really does depend on how frequently you use it as well as whether or not you have other settings turned on or off. Again, see the movie on Extending your Battery's Life in the Troubleshooting chapter at the end of this course for more information.
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