What is the difference between charging requirements?
Maintaining the battery may not be as simple as you initially thought. What works for one style may cause irreparable damage to another style. Please always follow the care instructions for the specific battery type, not all batteries are Sealed Maintenance-Free Battery.
Charge a fully charged battery
When a large amount of power needs to be consumed, a fully charged or damp battery works well. A fully charged battery can quickly meet the power demand, although replacing the allocated charge is another matter. Charging a fully charged battery quickly generates a lot of heat. Excessive heat can degrade the battery by sulfating the plates, resulting in a shortened service life.
Three stages are required to properly charge a fully charged battery: constant current charging, top charging, and floating charging. In the constant current charging process, charging 1A can increase the battery capacity by about 70%. The next step, charging the top charge, will make the whole process continue until it reaches 98% of the full charge, and the current will drop during this charging phase. The final stage is floating charging, which is to charge the battery fully or almost fully and keep it there.
Charging Sealed Gel Battery
A sealed Gel Battery is not resistant to high temperatures, just like a fully charged battery. Improper charging will not only shorten the life of the battery, but it may also cause irreparable damage to the interior immediately, even if it is a new battery. When charging a Sealed Gel Battery, it is very important to keep the charging rate low and slow. Otherwise, the heat will burn the electrolyte gel, rendering the battery useless.
Smart battery chargers compatible with gel batteries are most suitable for charging gel batteries. The constant current charging rate is adjusted to prevent the battery from overheating, and then the charger is switched to float charging. Gel batteries can be stored for a longer period of time in the floating state.
Charge the AGM battery
Due to its design, AGM batteries can be charged faster than fully-charged or gel-type batteries. In fact, it can charge up to five times faster than a fully charged battery. After the batch charging is completed, it is essential to switch the AGM battery to float charging to complete the full charge.
AGM batteries cannot be overcharged, so a smart charger compatible with AGM batteries should always be used.