1. Keep the voltage of the battery in the range of floating charge voltage. At this time, the corrosion of the battery grid (that is, the conductive skeleton of the electrode plate) is in the slowest state, which can prolong the service life of the battery.
2. Supplement the capacity loss caused by the self discharge of the battery and maintain sufficient power.
3. Inhibit sulfation caused by recrystallization of active substances.
There is no limit to the floating charge time of the battery. As long as the voltage is within the floating charge voltage range, the lead-acid battery is not afraid of floating charge. For example, the long-life battery used in the communication system has a warranty period of more than 8 years. During the whole service life, it is always in the floating charge state except for the use of mains failure and routine maintenance.
