Extended batteries are either a wonderful tool to help you get through your day, or a waste of money. There are many different ways to make an "extended" battery, not all of which yield better run-times. To ensure you're getting a battery that does what you expect it to, stick with OEM batteries from the manufacturer of your device.
Here's what we thought of the Samsung 2000mAh extended battery for the GSM version of their Galaxy Nexus.
