Lithium Ferrite Phosphate batteries has much better life span than lead-acid/AGM batteries. They also include protection circuits that prevent them from discharging too much, while lead-acid batteries are usually damaged permanently if they are allowed to completely discharge.

The ezeio is shipped with the charger set for LiFePO4 charging. DO NOT CONNECT a lead-acid battery to the charger unless you adjust the voltage appropriately

Below are some sources for suitable LiFePO4 batteries: