NEVER DEAL WITH THIS SELLER! They sold me two batteries totaling 320 amp hours each. In correspondence, the seller assured me that each battery, through a 230 volt inverter, would withstand a load of 400 watts before the battery charge dropped to 50%. However, with a full charge and a voltage of 12.6 - 12.7 volts at a load of 120 watts, the battery voltage sags to 11.9 volts, after which a protective shutdown on the solar system charge controller is activated. Batteries do not work for ten minutes! To my great regret, I checked the batteries 30 days after receiving them. After I informed the seller about my problem, he refused to refund me and communicated with me in an unacceptable manner.