A. Ionic’s “Deep Cycle�?batteries have true lithium capacity ranking at 1C discharge rate meaning a 12Ah “Deep Cycle�?lithium-ion battery will be able to supply 12A for 1 hour. Alternatively, most lead-acid batteries Have a very 20hr or 25hr rating printed for its Ah capacity which means the identical 12Ah lead-acid https://nuranu.com/products/lithium-ion-battery/21700-lithium-ion-battery/