How long do 500VA/500W UPS batteries take to recharge?

Lead acid batteries in a 500VA UPS will recharge within 4-8 hours up to 80% capacity. The amount of time that it takes to recharge a uninterruptible power supply battery is dependent upon the total size of the UPS charger (measured in Amps – A) and the size of the battery (Ampere-hour – Ah). A guide for long runtime UPS is to achieve a recharge of 80% within 24hours. Lithium-ion UPS will recharge quicker within 2hours