Overcharging or letting the battery sit idle will hasten the sulfation build-up in the battery plates. Constant recharging of the battery is important to reduce sulfate build-up in the plates. Reconditioning mode on a battery charger is meant to revive the capacity and performance of an old or deeply discharged battery. This process involves the charger cycling through multiple charge and discharge stages. It helps balance the charge across all cells, remove sulfation from the battery plates, and reconditioning-battery.weebly.com restore the battery's capability to hold and deliver a charge efficiently.
It can help improve batteries that are even as young as 1-2 years old. Battery reconditioning is typically performed when it has lost around 30-40% of its original capacity. However, if it’s lost part of its plates from sulfation or is severely corroded, it might not be recoverable.