This D-alkaline battery (D LR20-cell) of Panasonic, low self-discharge, it can be stored a long time, a continuous and reliable energy delivery. No leaks, suitable for use at low temperatures (-20 till 55 degrees), free of Hg /Cd /Pb,. Panasonic is a first class supplier of batteries of superior quality in non- and rechargeable batteries for industrial purposes. Panasonic's product line has rechargeable and not rechargeable batteries.