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Is it safe to power a raspberry pi from battery's?

Former Member

I want to make my raspberry pi portable, is  it safe to run it from battery's?

Parents

  • Consider power as water, current as speed of flowing water and battery as a container...

     

    What we really need to power anything is amount of the water(voltage) and throttle of the water(current)...

     

    If the water container(battery) is not providing enough amount of water(voltage), add more containers(batteries) in series...

     

    If the container(battery) is not providing enough throttle of water(current), add more containers(batteries) in parallel...

     

    So, yes we can power anything with this logic image

  • in reply to tonyboubady

    Have raspberry pi 3 w/7inch monitor. Need more voltage. Raspberry pi 3 needs exactly 5 volts or it will throttle. That's why PSU with starter kit is 5.25 volts. I tried my 15.000 m Amp hour battery. It doesn't

    drain fast, but it does not supply enough voltage for Pi3 not to throttle.

     

    Can pi 3 over volt. How far is safe if it can.

  • in reply to Former Member

    Eric Kazer

    I believe the problem is the current not the voltage. 15,000 mAh is a measure of current over time. I bet it delivers only 1.0 Amp. A Pi 3 needs more especially with a 7 inch display! If you have two usb connections, each is 1.0 Amp. Then drive one for the Pi 3 and separately drive the 7 inch display.

    Clem

Reply Children
  • in reply to clem57

    Battery pack has 2 1 amp outs, and 1 2.1 amp out. The pi3 is in the 2.1 amp out on the battery pack. When I was running pi2 it was ok. I should try putting the monitor and the audio amplifiers on their own 1 amp usb power outputs. The battery it's self might not be enough.

  • in reply to Former Member

    Thank You.

     

    It was amperage. I connected the Raspberry Pi3 to the 2.1 amp USB by its self & the monitor to one of the 1 amp USB, then the 2 amplifiers to the last 1 amp USB. The volt drop stopped. No more colored box. No more CPU speed drop which was awful. I'm surprised at how critical .1 volt drop is to pi 3. That's all it was dropping. Now I can run games like Street Fighter movie, Metal Slug 4, Metal Slug X,3, etc..

     

    Thanks again,

    Eric