Lenovo ThinkCentre M55 User Manual - Page 53

Changing, battery

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Changing the battery Your computer has a special type of memory that maintains the date, time, and settings for built-in features, such as parallel-port assignments (configuration). A battery keeps this information active when you turn off the computer. The battery normally requires no charging or maintenance throughout its life; however, no battery lasts forever. If the battery fails, the date, time, and configuration information (including passwords) are lost. An error message is displayed when you turn on the computer. Refer to "Lithium battery notice" on page x for information about replacing and disposing of the battery. To change the battery: 1. Open the computer cover. See "Opening the cover" on page 21. 2. While holding the left rear of the computer chassis down, pull upward on the handle provided to remove the PCI riser and any adapters that are currently installed. 3. Locate the battery. See "Identifying parts on the system board" on page 23. 4. Remove the old battery. Chapter 3. Installing options 37

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Changing
the
battery
Your
computer
has
a
special
type
of
memory
that
maintains
the
date,
time,
and
settings
for
built-in
features,
such
as
parallel-port
assignments
(configuration).
A
battery
keeps
this
information
active
when
you
turn
off
the
computer.
The
battery
normally
requires
no
charging
or
maintenance
throughout
its
life;
however,
no
battery
lasts
forever.
If
the
battery
fails,
the
date,
time,
and
configuration
information
(including
passwords)
are
lost.
An
error
message
is
displayed
when
you
turn
on
the
computer.
Refer
to
“Lithium
battery
notice”
on
page
x
for
information
about
replacing
and
disposing
of
the
battery.
To
change
the
battery:
1.
Open
the
computer
cover.
See
“Opening
the
cover”
on
page
21.
2.
While
holding
the
left
rear
of
the
computer
chassis
down,
pull
upward
on
the
handle
provided
to
remove
the
PCI
riser
and
any
adapters
that
are
currently
installed.
3.
Locate
the
battery.
See
“Identifying
parts
on
the
system
board”
on
page
23.
4.
Remove
the
old
battery.
Chapter
3.
Installing
options
37