We find the same NP-FW50 7.2 V, 1020 mAh swappable battery pack as the original a7R and the rest of the Sony Alpha lineup—good news for anyone building a fleet of flagship mirrorless cams.

Sony advertises a 290-photo battery life (up to 340 without the electronic viewfinder), a minor increase from the 270-photo limit of last year's model.

Sony kindly included not one but two batteries. You can also charge the battery inside the camera (USB adapter included), and even power the camera entirely via USB.