The battery compartment is located in the base of the camera's hand grip. The battery locks into place with a small sprung catch. The door then locks, with a fold-down release lever to re-open it like the one found on the K10D and K20D.
The battery itself is the new D-LI90, which offers slightly greater capacity in a slightly smaller format than the D-LI50 used in the K10/20D. Despite the higher resolution LCD screen, the K-7 is able to record 740 images on a charge, according to CIPA standard tests (which are a bit like gas mileage/fuel economy figures - they are comparable between products even if they don't always reflect real-world performance). By comparison, the K20D could only record 530, based on the same testing regime.
Pentax's own testing methods (based on different assumptions of typical usage), suggest the K-7 can produce 980 shots on a single charge, compared to the company's figure of 740 for the K20D.
Secure Digital (SD/SDHC) compartment
The K-7 loses its predecessor's lever-operated card door, instead getting a slide-and-hinge affair with a rubber wedge built into the underside to provide some environmental sealing. The distance between slot and door is very small which makes the card insertion/removal process a little fiddly.
The K-7 also loses the solid door that its predecessors used to cover their I/O ports. In its stead the K-7 has a flexible rubber cover that protects the new HDMI output along with the USB/AV connector and DC power socket.
The K-7 also gains an external microphone socket, allowing the use of higher-quality external microphones that can be moved away from the camera to ensure that they pick up the sound of the recorded scene, rather than the camera operator. It's located above the I/O ports on the left side of the camera.
The standard flash sync PC socket is located towards the front of the camera. On the other side of the camera, below the door of the SD card compartment, you'll also find a remote control socket.
Camera base / tripod mount
The base of the camera has a metal tripod mount aligned with the lens axis and focal plane. Off to the left are the contacts for the new battery grip (D-BG4)
The K-7 has a 'P-TTL' pop-up flash unit which has an electronic catch-type release (meaning it can be raised manually or automatically by the camera). The flash unit has a guide number of 13 (which equates to an approximate range of 4.6 m at F2.8, ISO 100) and a field of view coverage of approximately 28 mm (35mm equivalent). Flash sync speed remains at 1/180 sec.
The K-7 hot-shoe can be used with Pentax specific flash units to achieve P-TTL auto flash, high-speed sync and wireless (such as the AF540FGZ or AF360FGZ) or simply to provide a sync signal to third party flash or studio strobes.
Like the K20D the K-7 also has a flash sync socket on its flank.
The K-7 has a KAF2 bayonet lens mount which can take lenses with a KAF3, KAF2, KAF or KA mount. There's no mechanical coupling to control the aperture on pre-A K-mount lenses, so it's stop-down metering only if you want to use older lenses.
Pentax has a comprehensive range of DA 'designed for digital' lenses which are specifically designed for the APS size sensor, including its unique and desirable 'Limited' range of high-quality primes. As usual there is a red indicator dot on the mount for aligning the lens, which locks by rotating clockwise.