An Inverter SMF (Sealed Maintenance-Free) battery is a specialized type of battery designed for use with inverters, which convert direct current (DC) into alternating current (AC) for powering electronic devices during power outages. The "Sealed Maintenance-Free" designation indicates that the battery is sealed, preventing the escape of gases and electrolyte, and it doesn't require periodic maintenance. Constructed with lead-acid technology, Inverter SMF batteries consist of lead dioxide and sponge lead plates immersed in an electrolyte solution. The sealed design eliminates the need for checking or topping up electrolyte levels, making these batteries highly convenient for users.