Nobody likes a low battery indication on their devices. For most of the phones you can have a spare battery in case of emergency. But what would you do if your iPhone or iPod are out of battery? Definitely, there is no swappable battery available for these. Helping the same problem Phonesuit has designed a tiny rechargeable battery for your iPhone and iPods. Smaller than a size of thumb, primo can be easily accommodated in your pocket or could be held in a key chain.
When needed, it can give you and additional uninterrupted talk time of up to 3 hours. Primo can easily be attached to your iPhone or iPod. For recharging, connect it to any 2.0 or 1.1 compatible USB outlet. For the battery storage display primo has three green LED’s on the front. During the charging the light is red and turns green when it is fully charged.
Primo has an 800mAh lithium ion battery which serves best for iPhone and iPod Touch. It comes up at a price of $35 and one year limited repair and replacement warranty. [Product Page]