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How often should 5PX G2 UPS batteries be charged if the UPS is not installed?

When the 5PX G2 UPS is plugged in and connected to utility power, the UPS will charge the batteries according to the ABM charging technology. However, Eaton recommends recharging the 5PX G2 UPS every six months to prevent batteries from being damaged through self-discharge during storage. Charging time should be 48 hours in an ideal case with a minimum recommended time of 24 hours. Plugging in the 5PX G2 UPS to the local utility power is usually the easiest method for recharging the batteries and the 5PX G2 will automatically begin charging the batteries once the unit is plugged in.