The powerStick for ezVision is a great solution for long trips. The powerStick charges the battery of your ezVision during use. The powerStick uses 4 AA batteries. With a new set of batteries, the powerStick can completely charge your ezVision battery 3 to 4 times. Witha fully charged ezVision battery, you can get 20 or more total hours for the ezVisoin X4 and 32 or more hours with the ezVision G1.