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power consumption of pc

Discussion in 'General Electronics Discussion' started by RRITESH, May 24, 2016.

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  1. RRITESH

    RRITESH

    85
    3
    Oct 10, 2010
    Hello,
    I have computer with CRT of 15inch and CPU with necola 625VA
    the battery is 12V single 7.2AH.
    please tell the battery can give 7.2A per hour totaly.
    but my computer work backup for few minutes how to calculate the current from battery?
     
  2. shrtrnd

    shrtrnd

    3,763
    485
    Jan 15, 2010
    The CRT is going to be the big power consumer here.
    Does the CRT monitor list it's power consumption on its nameplate, somewhere on the monitor housing?
    ... I think I better ask. Are you actually using a CRT monitor, or a regular flat-screen monitor.
    CRT means 'cathode ray tube', which are pretty obsolete these days. Maybe you're using the term 'CRT'
    generically, and don't actually mean the old-style cathode ray tube?
     
    RRITESH likes this.
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,411
    2,779
    Jan 21, 2010
    a 7.2 Ah battery can supply 360mA for 20 hours. At a higher current you will get less than 7.2Ah.

    if you're powering something requiring 625VA, the battery might last 5 minutes.
     
  4. RRITESH

    RRITESH

    85
    3
    Oct 10, 2010
    yes crt
    So what will be the current
     
  5. davenn

    davenn Moderator

    13,648
    1,884
    Sep 5, 2009
    you haven't given enough info
    is the 12V battery going to feed an inverter to 240V for the monitor and computer ?
     
  6. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,411
    2,779
    Jan 21, 2010
    Rritesh, we're not here to do your homework (which I suspect this is).
     
    RRITESH likes this.
  7. RRITESH

    RRITESH

    85
    3
    Oct 10, 2010
    ok
     
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