(1) High energy density up to 420WH/Kg(800WH/dm3). (2) High operation voltage, 3.3V~3.6V upon loading resistance. (3) Long storage life, less than 2% of self-discharging rate per year, could be stored for 10~15 year at room temperature. (4) Non-magnetic stainless steel case, hermetically sealed. Be safe for transportation and general shock. No leakage problem. Energy type C size battery ER26500 Capacity:8500mah Voltage:3.6v Operating temperature: -55~+85