500 mAh Power Booster cable set. The Power Booster cable set is compact and can be easily attached to your key ring or the handle of your bag. It contains a 500 mAh Lithium Polymer battery to boost your device when you are running out of charge. The charging cable consists of a Micro USB adaptor to charge Android devices. The lightning adaptor is located on the bottom of the housing and should be applied to the Micro USB adaptor of the cable to charge any Apple device. ABS Plastic.