Specification:
<br />                                                                  100% brand new and high quality
<br />                                   Can be packed into 4x18650 batteries and combined them to bicycle lights powered
<br />                                                            Output voltage: 8.4V, Input voltage: 8.4V
<br />                                Standard 5.5DC Interface (Case diameter 0.95cm, 0.5cm diameter within the interface)
<br />                                                                 Cable: 60cm (it has the USB cable )
<br />                                                          Can put 4x18650 batteries in to power bicycle lights
<br />                                          Application Load 4x 18650 batteries (Batteries do not include)
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<br />                                                                                         Package include: 
<br />                                              1x battery pack cover (batteries and chagere do not include)