Particularly in the LTE network, the BlackBerry Q10 takes a lot of energy. So it sometimes happens that the battery the day does not survive. With the BlackBerry ACC I'm on the safe side. The charger has a highly visible display and charges the battery with a USB power adapter or PC. The battery can be kept very well and carry the charger. It's not much bigger than the battery itself and has a 2 port which is used for simultaneous charging with a smartphone.
From me an absolute buy recommendation and 5 star.