CAUTION: Because of the short shelf life of the batteries, avoid storing a battery spare as a backup. Do not maintain an inventory of spare batteries on site unless a procedure to keep these batteries charged while in storage is implemented.

a.Connect the UPS to utility power.

b.Allow the UPS to remain in Standby mode.

c.Allow the UPS to charge the batteries for at least 24 hours.

d.Update the battery recharge date label.

UPS battery replacement procedure

This component is hot-swappable and can be replaced without powering down the UPS.

1.(optional) To replace the component with the UPS powered down, refer to "Powering down the UPS (on page 30)."

CAUTION: When hot-swapping batteries, the UPS is not protected in the event of a utility power failure, unless at least one ERM is installed.

2.Remove the UPS front bezel ("Removing the UPS front bezel" on page 32).

3.Remove the UPS battery bracket ("Removing the UPS battery bracket" on page 17).

4.Remove the UPS battery modules.

To replace the component, reverse the removal procedure.

IMPORTANT: Charge the batteries for at least 24 hours before supplying backup power to devices. The batteries charge to:

•80 percent of their capacity within 3 hours

•100 percent of their capacity within 48 hours

Maintenance 36