power consumption??

Discussion in 'General Electronics Chat' started by ENG99, Sep 12, 2015.

  1. ENG99

    Thread Starter Member

    Feb 13, 2014
    37
    0
    Hey, can anyone help me
    What is the power consumption when battery capacity is 100Ah and it works for 20 minutes?


    Thanx
     
  2. ScottWang

    Moderator

    Aug 23, 2012
    4,855
    767
    You didn't mention the draw current of load, I = ?A
     
  3. #12

    Expert

    Nov 30, 2010
    16,337
    6,820
    If there is no voltage there is no power.
    If you don't tell me the voltage, I can't calculate the power.

    If 100 AH is gone in 20 minutes, that's 300 amps. Still, with no voltage, there is no power.
     
  4. dl324

    Distinguished Member

    Mar 30, 2015
    3,250
    626
    P=IV.

    There's a wealth of battery info at batteryuniversity.com
     
  5. BR-549

    Well-Known Member

    Sep 22, 2013
    2,004
    394
    If it's a good battery.........hold on to it. You'll have trouble replacing it.
     
    Last edited: Sep 12, 2015
  6. umphrey

    Member

    Dec 1, 2012
    39
    1
    Also you can buy it new at 100 Ah but it will degrade over time, and you probably aren't discharging it completely, and depending on how you are discharging it power may or may not be constant over the 20 minute time period. It's going to be very hard to accurately figure out power based on Ah and voltage when really it's very easy if you measure current and voltage.
     
Loading...