Connect with us

Power consumption calculation

Discussion in 'General Electronics Discussion' started by Yog67, Dec 24, 2016.

Scroll to continue with content
  1. Yog67

    Yog67

    2
    0
    Dec 24, 2016
    Hi guys. I'm completely new to electronics. I need a little help actually. I will keep it short.

    Let's assume I'm having a battery of 9000mAh and a device rated as 5V, 55mA. My question is if I'm powering the device with that battery. How long will the battery last in hours assuming it had full charge? I would like to know the calculation steps for this. Thanks.
     
  2. cjdelphi

    cjdelphi

    1,096
    104
    Oct 26, 2011
    Is the battery 5v or not? Supposing it was 5v then it's a case of (but i'm not claiming 5v bstteries exist)

    9000mah (capacity)
    /
    55ma
    =163 hours
     
    Last edited: Dec 24, 2016
  3. Audioguru

    Audioguru

    3,002
    673
    Sep 24, 2016
    Nobody makes a 5V battery. It might be 7.4V then a low dropout regulator will have a 5V output until the battery voltage drops too low.
     
  4. cjdelphi

    cjdelphi

    1,096
    104
    Oct 26, 2011
    Nobody makes a 5v battery... yet lol
     
  5. cjdelphi

    cjdelphi

    1,096
    104
    Oct 26, 2011
    Mixing two battery chemistries to produce 5v surely can be done, this battery is close at 4.5v
     

    Attached Files:

  6. Yog67

    Yog67

    2
    0
    Dec 24, 2016
    Thanks for the reply guys. BTW if it matters take battery as 11.42 V, 74.9 Whr for the 6000mah for instance.
     
    Last edited: Dec 24, 2016
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-