Supercapacitor Charge/Discharge Performance. Carbon AGM - Longest Life AGM On The Market. Design Life 20 Years. 10 Year Factory Warranty. High Temp Operating Environment/ Up to 50C (122F). Use for 12v / 24v / 48v Systems. Sizes: 9.6 kWh, 14.4 kWh, 19.2 kWh, 24 kWh, & Larger. up to 100 kWh. Safe & Sealed, Maintenance Free Battery, Non-Hazmat.