Removing and Replacing the System Battery
The system battery is located on the I/O board assembly. Replace the battery with an identical or
equivalent battery only. Dispose of used batteries according to the manufacturer’s instructions.
WARNING! Lithium batteries can explode if mistreated. Do not recharge, disassemble, or dispose
of batteries in a fire. Failure to observe this warning can result in personal injury or damage to
equipment.
Removing the System Battery
WARNING! Ensure that the system is powered off and all power sources have been disconnected
from the server prior to performing this procedure.
Voltages are present at various locations within the server whenever an AC power source is
connected. This voltage is present even when the main power switch is in the off position.
Failure to observe this warning can result in personal injury or damage to equipment.
CAUTION: Observe all ESD safety precautions before attempting this procedure. Failure to follow
ESD safety precautions can result in damage to the server.
IMPORTANT: Before removing the system battery, record all boot and LAN configuration settings.
(Find the settings using the INFO ALL EFI command.) You must reset these values after replacing
the battery.
To remove and replace the system battery, follow these steps:
1. Power off the server and disconnect the power cables. See “Powering Off the Server”
(page 90).
CAUTION: You must remove the I/O board assembly to service the system battery. The
removal and replacement of the I/O board assembly occurs through the rear of the rack for
rack-installed servers. Carefully follow the removal and replacement procedures; you must first
perform several tasks with the server extended out from the front of the rack. See “Removing
and Replacing the I/O Board Assembly” (page 223) for complete instructions.
2. Remove the I/O board assembly. See “Removing the I/O Board Assembly” (page 223).
3. Locate the system battery on the I/O board assembly (Figure 78).
WARNING! Do not attempt to remove the battery by hand. Doing so can cause the battery
holder to separate from the system board.
WARNING! Do not attempt to remove the battery from the side marked “+” first. If your
battery holder does not have the “+” marking, the side of the holder with springs will be the
“+” end.
4. Using a nonconductive tool small enough to fit into the battery slot as leverage, gently remove
the battery from the holder from the end marked “---“.
NOTE: HP recommends using ESD safe, non-conductive tweezers or a similar tool.
Removing and Replacing the System Battery 227
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