If we do not yet know what the future will have autonomy HTC One M9 (Hima), at least we know that Taiwan has everything to satisfy its users in this area. As reported today the Upleaks, the company will soon launch three external batteries series Battery Bar respectively displaying capacities of 3500, 4000 and 6000 mAh.  Following in the footsteps of Xiaomi and OnePlus and compensating a noticeable lack on its devices, because their unibody design does not allow them to offer a removable battery, HTC is about to announce three external batteries. Announces that, as Upleaks suggests,