Higher discharge rate for more powerful devices such as SLR cameras
Superior leakage resistance and excellent storage characteristics.
Stable discharge under wide range of temperatures/environmental conditions.
Light weight (power to weight ratio) compared to other types
This Maxell CR2 battery is called by these names also:
Energizer ECR2
Duracell DLCR2
Rayovac RLCR2
Varta CR2