Can you use a 12 volt charger to charge 24 battery?

No, a 12-volt charger cannot be used to charge a 24-volt battery. A 12-volt charger provides 12 volts of electrical potential, which is insufficient to charge a 24-volt battery. To properly charge a 24-volt battery, a 24-volt charger or a multi-stage battery charger capable of delivering 24 volts is required. Using a 12-volt charger on a 24-volt battery may damage the battery or lead to undercharging, which can reduce the battery's performance and lifespan.