It generally takes about 6 to 8 hours to fully charge the battery of an electric wheelchair, but the specific charging time will vary depending on factors such as battery capacity, battery type (such as lead-acid battery or lithium battery), charger power, and the current remaining power of the battery. For example, an electric wheelchair equipped with a 24V battery with a capacity of 12Ah will take approximately 5 to 6 hours to be fully charged based on a 0.5C charging rate. Some electric wheelchairs may be equipped with fast charging technology, which can shorten the charging time to 2-3 hours. When using an electric wheelchair, it is recommended that users follow the charging guidelines provided by the manufacturer and ensure the use of original or compatible charging equipment to ensure battery life and safety. Also be careful to avoid overcharging for a long time to avoid damage to the battery.