Do VRLA batteries have a “memory” like ni-cad batteries?

One of the major disadvantages of nickel-cadmium (ni-cad) batteries is that after shallow discharge cycles, the unused portions of the electrodes “remember” the previous cycles and are unable to sustain the required discharge beyond the depth of the previous cycles. The capacity is lost and can only be restored by slowly discharging completely (generally outside the application), and properly recharging. VRLA batteries do not exhibit this “use it” or “lose it” capacity robbing effect known as memory. It is important to note however that if any lead acid battery is left unattended for extended periods of time its ability to do its job will be diminished and eventually extinguished.