The Ionic Deep Cycle Battery has a cycle life of 3,000 cycles or about 10 calendar years. Our lithium-ion batteries have a usable capacity of 99% compared to 50-60% for traditional lead-acid batteries. LithiumHub Deep Cycle batteries function in the widest range of temperatures with a discharge temperature range (Functional) of –20°C to 60°C (–4°F to 140°F) and a charge temperature range of 0°C to 45°C (32°F to 113°F). Automatically detects if batteries are too cold to take a charge. At 3.96" (L) x 5.91" (W) x 3.99" (H) and weighing only 3.5 lbs., the Ionic Lithium Deep Cycle 12V12-EP has the best size to power ratio of any deep cycle battery on the market. Connectors: F2, 0.25", 6.4 mm Spade Terminals allow the battery to be installed in any direction unlike lead-acid batteries which are fixed. Ionic Lithium Deep Cycle Batteries self-discharge rate per month is between 1-3% compared to lead-acid batteries which are about 30%. Max charge voltage is 14.6V and the discharge cut-off voltage is 10.5. Max charge current is 12A and max discharge current is 30A / 60A(3s). Peak discharge current is 60A(3s) with 360W continuous and 700W (3s) peak. Can be charged with solar chargers. Can be charged with most traditional lead-acid chargers that do not have "Desulfate" mode, provided the current levels do not exceed lithium battery charge specification. Using a traditional lead-acid charger that reaches 14.4-14.6 volts will allow the battery to be fully charged. Chargers that do not exceed 13.6 volts will only charge the battery to 50% capacity or less.