iKit USB Battery is a newly launched battery. There are 4 colours for your choice:Sliver, Black, Purple, Blue. In addition, it has two kinds of the thread which can meet your demand.
Colour: Sliver, Black, Purple, Blue
Capacity: 650MAH, 900MAH, 1000MAH
Length: (510) 83mm/98mm/108mm
There are two kinds of thread for your choice.
4 kinds of colour are available.
Charge it by USB port.