Ready to replace the battery in your smartphone? It's a smart way to extend the life of the device for $70 or less. Consumer Reports explains where you go to get the job done.

Once your phone gets a fresh battery and the processor kicks back to 100 percent, there’s a chance you might not feel the need to upgrade your iPhone for a while.

Most manufacturers want you to believe you can't replace your battery, but that's not true. Doing so can add years of life to your device.

Android is preparing to give you an estimate of the remaining capacity of your phone's battery, making it easier to know when to replace it.