The portable Monster Mobile Power- Card’s 1,650 mAh lithium-ion polymer battery makes it possible to charge smartphones or USB devices at high speed. The user just has to attach the cable and press the charging button. The battery’s auto-sensing technology detects how much power the device in question needs. It is housed in an ergonomically well-conceived casing, that is available – with the company’s name on it – in five vibrant colours.