HP UPS Extended Runtime Module - Manual (Page 37)

Maintenance 37
1. (optional) To replace the component with the UPS powered down, refer to "Powering down the UPS
(on page
31 )."
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 33 ).
3. Disconnect the battery leads.
4. Remove the UPS battery bracket.
5. Remove the UPS battery modules.
To replace the components, reverse the removal procedure.
IMPORTANT: Charge the batteries for at least 24 hours before supplying backup power to
devices. The batteries charge to:
• 90% of their capacity within 4 hours
• 100% of their capacity within 24 hours