Online Shop USBfever began selling an unusual accessory for the iPhone - external battery, equipped with an adapter to use the phone with two SIM-cards.
The new accessory also serves as a protective carrying case, while synchronization and charging of internal and external batteries can be carried out through the integrated USB-cable without removing the phone out. Capacity Battery - 1900 mA.h, which, according to USBfever, increases the duration of the phone in standby for several days.
Using two SIM-cards - a practice popular with thrifty users, as well as those who use the phone overseas roaming.
An accessory is compatible with the iPhone 3G and iPhone 3GS. Cost - $ 59.95.