Joyetech eGo AIO ECO Overview The eGo AIO ECO e-cig kit is an embodiment of why we should never judge a book by its cover. Underneath its meticulously crafted exterior, lies a veritable treasure trove of e-cigarette technology. Joyetech dubbed this new technology ‘ECO’ due to its ability to drastically extend the 650mAh battery capacity of the device. It does this by lowering the standard voltage output of the battery to 1.8V (to use an example, a fully charged 18650 e-cigarette battery outputs 4.2V). This low voltage output is then paired with the low resistance BFHN atomizer head, resulting in a battery that can last almost double the amount of time. In addition to this, the eGo AIO ECO provides a convenient top filling solution, making refills quick and efficient, whilst a changeable LED light situated within the tank section adds another layer of customisation.