One of the only bad things about my iPhone is that the battery just doesn’t last long when I use it to play games or surf the internet. A good 45 minutes of gaming eats half the battery capacity. That means I often end up needing an external battery to keep playing.

Unioo has unveiled a pair of new batteries specifically for the iPhone and iPod that connect to the charge port of the devices. The batteries include the i800 and i1500. The difference between the two is that the i800 has 800mAh of power and the i1500 has a 1500mAh battery inside. The i800 can be pre-ordered for under $40.

A much larger i5400 battery pack is also available that is designed to charge all sorts of devices. The i5400 has a 5400mAh battery and adapters for charging USB gadgets, mobile phones, the PSP, and Nintendo DSI.

Unioo