Check the state of a battery. It is a good thing to do. If the reading comes below 12. 4 volts, charge the battery. The battery can be charged in 1 hour. Never charge your battery more than 48 hours. Excessive charging will damage your battery.
Follow the instruction on the battery before charging. The battery charger could be automatic or manual. The best thing about automatic charger is it goes to a float mode after it charges your battery fully. In other words, it stops itself from overcharging your battery. It is safe and reliable. Charging the battery means increasing the efficiency of your battery.