The Power Tube 2600 Shake portable battery charger is certified for use with the iPod and iPhone. It has an aluminium case which is available in an assortment of vivid and durable anodised colours. The device also allows smartphones from other manufacturers to be charged, for accompanying the Power Tube are not just connectors for Apple products but also mini- and micro-USB cables to link up with most other conventional phones. The battery of the device is in turn charged via USB connection to a computer.