Installing and Replacing Desktop Board Components 
55 
Replacing the Battery 
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory.  When 
the computer is not plugged into a wall socket, the battery has an estimated life of 
three years.  When the computer is plugged in, the standby current from the power 
supply extends the life of the battery.  The clock is accurate to ± 13 minutes/year at 
25 ºC with 3.3 VSB applied. 
When the voltage drops below a certain level, the BIOS Setup program settings stored 
in CMOS RAM (for example, the date and time) might not be accurate.  Replace the 
battery with an equivalent one.  Figure 26 on page 59 shows the location of the 
battery. 
  CAUTION 
Risk of explosion if the battery is replaced with an incorrect type.  Batteries should be 
recycled where possible.  Disposal of used batteries must be in accordance with local 
environmental regulations. 
  PRÉCAUTION 
Risque d'explosion si la pile usagée est remplacée par une pile de type incorrect.  Les 
piles usagées doivent être recyclées dans la mesure du possible.  La mise au rebut des 
piles usagées doit respecter les réglementations locales en vigueur en matière de 
protection de l'environnement. 
  FORHOLDSREGEL 
Eksplosionsfare, hvis batteriet erstattes med et batteri af en forkert type.  Batterier 
bør om muligt genbruges.  Bortskaffelse af brugte batterier bør foregå i 
overensstemmelse med gældende miljølovgivning.  
  OBS! 
Det kan oppstå eksplosjonsfare hvis batteriet skiftes ut med feil type.  Brukte batterier 
bør kastes i henhold til gjeldende miljølovgivning. 
  VIKTIGT! 
Risk för explosion om batteriet ersätts med felaktig batterityp.  Batterier ska kasseras 
enligt de lokala miljövårdsbestämmelserna. 
  VARO 
Räjähdysvaara, jos pariston tyyppi on väärä.  Paristot on kierrätettävä, jos se on 
mahdollista. Käytetyt paristot on hävitettävä paikallisten ympäristömääräysten 
mukaisesti.