The larger upgrade to get a 3 solid hours work, even using the external BP output connected to a OLED or Atomos recorder. Can also be used as USB external pack to charge or power any system this way. Genuine product.
It is a replacement battery for the Sony BP-U90 and is compatible with the Sony PMW-EX1/3/F3/200/FS7/PXW-X160/180 series cameras. The battery exchanges digital information with your camera, allowing you to display remaining power information on the camera’s viewfinder. A 14.4V nominal voltage provides an 86Wh / 6Ah capacity and an approximate 6-hour runtime when the LCD monitor is on.
A D-tap DC output socket enables you to connect an on-camera LED light, monitor, or wireless transmitter and receive power simultaneously with your camera. The D-tap socket can also be used as a charging input.
A nice review is available here