Mirrorless cameras have been dogged by poor battery life for years, but Panasonic’s new GX9 boasts some pretty impressive improvements on that score.

The new camera can achieve up to 900 shots per charge, per CIPA standards, thanks to a new set of power-saving features that automatically push the camera into sleep mode when the EVF’s eye sensor no longer detects an eye. To achieve the maximum battery life, the camera must be set to sleep after one second of inactivity. You wake the camera with a half-press of the shutter.

Beyond improved endurance, the GX9 sports a 20.3-megapixel Digital Live MOS Sensor without a low-pass filter and an ISO range of 200-25,600.

It has a 5-axis stabilization system good for up to 4 stops of correction. It’s compatible with Panasonic’s Dual IS technology for enhanced stabilization with select Panasonic lenses.

The camera uses a contrast AF system with Panasonic’s Depth From Defocus (DFD) technology that exchanges a digital signal between the camera and the lens up to 240 frames per second (fps). You can hit 9 fps in burst shooting with focus locked on the first frame or 6 fps with continuous AF.

The camera sports an 2760K-dot electronic viewfinder that tilts up at 80-degrees. The shutter is driven by an electromagnetic drive which Panasonic says reduces shutter blur by up to 90 percent.

Additional features include:
* 4K video recording (3840 x 2160) at 24p or 30p
* Full HD video at 60p
* Face/Eye detection AF
* Low-light focusing down to -4EV
* A 3-inch touch display that tilts up 80-degrees and down 45 degrees
* A Live View Boost mode to increase sensitivity during preview to help compose a scene in low light
* 4K Photo mode to pull an 8-megapixel still from a 30fps burst of images with a new Auto Marking feature that automatically highlights an image in the burst that’s significantly different than the rest of the sequence
* Wi-Fi and Bluetooth Low Energy for maintaining a constant connection between camera and smartphone
* 1/4000 sec. max mechanical shutter speed; 1/16,000 sec. electronic shutter
* Focus and aperture bracketing

The GX9 is due in March with a new 12-60mm F3.5-5.6 kit lens for $999.