The Canon LP-E4 Rechargeable Lithium-ion Battery, has a capacity of 2300 mAh, so it is possible to shoot up to 2200 shots at normal temperatures on a single battery charge. The battery is also more compact and lighter in weight than previous battery models.
The LP-E4 Battery also communicates with the EOS-1D Mark III & EOS-1Ds Mark III, so that you can always check the remaining capacity (marks in six levels and percentage in 1% increments), shutter count and recharge performance (3 levels) on the camera's power source info screen.
The Canon LC-E4 Battery Charger can charge two LP-E4 battery packs simultaneously and provides a charging time of about 120 minutes when recharging one battery. When in use, the charger performs battery capacity calibration so that the remaining battery level can be indicated accurately when used in the EOS 1D Mark III camera. The LC-E4 charger is also compatible with DC power (12V/24V), when it is connected to a car power socket with the optional CB-570 Car Battery Cable.
The Canon ACK-E4 AC Power Adapter is designed to supply uninterrupted power for your camera while downloading pictures to your Computer, for extended work in a studio, or while viewing images while connected to your TV or VCR. It's compatible with the Canon EOS 1D mark III SLR Digital Camera.
The Canon Eg Eyecup is a replacement eyecup for the EOS-1D Mark III, 1Ds Mark III, and 7D cameras. Camera eyecups provide cushioning around the camera's eyepiece, and are especially useful to eyeglass wearers.