Device maintenance and repair   
7.4 Installing and removing hardware 
  SIMATIC IPC847D 
98  Operating Instructions, 01/2014, A5E32997454-AA 
 
Replacing the backup battery 
The battery is used to back up the CMOS data for BIOS setup and the real-time clock. 
Items to observe for replacement 
 
Note 
Batteries are wearing parts. Backup batteries should be replaced at intervals of 5 years in 
order to maintain PC functionality.
 
 
The lithium battery may only be replaced with an identical battery or with a type 
recommended by the manufacturer (Order No.: A5E00047601). Information about the 
original spare parts for SIMATIC PCs is available in the Internet at SIMATIC IPC after-sales 
information system (http://www.siemens.com/asis
).  
 
Used batteries must be disposed of in accordance with local regulations. 
 
Note 
The configuration data of the device may be deleted when you replace the backup 
battery, 
depending on BIOS settings.
 
The configuration data are retained in the BIOS "Profile: User" setting; only the date and time 
must be set again. 
 
●  The BIOS setup parameters of the device are written down, for example, in the table in 
chapter "Auto-Hotspot". 
●  The device is opened.