The perfect rechargeable battery for high drain professional devices when longest run time is the most important factor. Enjoy power-shooting when using to power your camera and other energy-hungry devices.With a typ. capacity of 2550mAh, this premium model is FUJITSU's longest lasting battery. It retains approx.85% of its charged capacity,even after 1 year storage. Partially charged by solar.Fujitsu Rechargeable Battery" can be used at temperature as low as -20 degrees.