9Volt-alkaline battery (6LR61-block battery) of Panasonic, low self-discharge, it can be stored long time, continuous and reliable energy delivery. No leaks, suitable for use at low temperatures (-20till +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.