Energizer’s Energi To Go is a handy tool for those who find themselves needing power for their handheld device without access to a wall socket for powering up or charging. This tiny unit is powered by 2 AA batteries, which you can use to either power up your mobile device or charge it on the go. You can check Energi To Go if it is compatible with your handheld - it can plug into any device that uses a miniUSB cable for syncing. You can even try it for yourself at the store, because Energizer created such innovative packaging for the product. You can try to connect your mobile device at the back of the packaging for testing. Also, this unit is readily available from hardware stores, groceries, and office supply shops. Because it is powered by 2 AA batteries, it’s easy to get your hands on replacement batteries anywhere in the world. This device is also affordable, so you can buy more than one in case of emergencies.