A 1500 Rack mount power supplies contain batteries that provide a continuous power source to the computer systems connected to them (most likely a server bank), so that should a building's power fail the computers will still be able to function. If the batteries in the 1500 fail, the power supply won't work, leaving the computers vulnerable. Replacing the batteries in a 1500 Rack mount takes about 30 minutes.
1). Look on the front of the 1500 mounted in the rack and locate the battery pack cover, on the right side of the assembly. Using a screwdriver, take off the screws holding the cover to the assembly. Place the cover and the screws in a safe place.
