Power-charge 500 mAh booster USB charging cable. 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, it provides up to 20% extra charge on your mobile. The charging cable consists of a Micro USB adapter to charge Android devices. The lightning adapter is located on the bottom of the housing and should be applied to the Micro USB adapter of the cable to charge any Apple device. ABS Plastic.