IBM Storwize V7000 Unified Problem Determination Manual page 245

Attention: If your system is powered on and performing I/O operations, go to
the management GUI and follow the fix procedures. Performing the replacement
actions without the assistance of the fix procedures can result in loss of data or loss
of access to data.
Even though many of these components are hot-swappable, they are intended to
be used only when your system is not up and running and performing I/O
operations. If your system is powered on and performing I/O operations, go to the
management GUI and follow the fix procedures. Performing the replacement
actions without the assistance of the fix procedures can result in loss of data or loss
of access to data.
Be careful when you are replacing the hardware components that are located in the
back of the system that you do not inadvertently disturb or remove any cables that
you are not instructed to remove.
About this task
Each power supply unit in a control enclosure contains an integrated battery that
is used during temporary short-term power outages. You must replace the battery
with the exact same model.
To replace the battery in the power supply unit of the control enclosure, perform
the following steps:
Procedure
1. Read the safety information to which "Preparing to remove and replace parts"
on page 210 refers.
2. Follow the removing steps of the replacing a power-supply unit procedure. Go
to "Replacing a power supply unit for a control enclosure" on page 215.
3. Remove the battery, as shown in Figure 46 on page 226.
Chapter 5. Control enclosure
225