How to power a Rpi4 + Camera project with a battery

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Hello,

I’m working on a project where I need my Raspberry Pi 4 + camera to be portable. I am using a huge 3A, 20000 mA USB power brick for testing, but I’d like to shrink it down. Maybe 5000mA could do so it doesn’t weigh so much.

I could use some help finding the right battery + regulator + charger combo. The battery output will be connected to the rpi4 pins, not the USB connection (USB port is in the camera’s way in the case I’m using).

Here are the devices from what I could find on the manufacturer’s sites.

  • .18A - small fan

  • 3A - rpi4

  • 100mA - screen

  • 700mA (1.5W) - Camera

    • So just under 4Amps of power needed, right? It’s running off the 5v/3A battery pack OK (no lightning symbol appearing) but adding up the numbers it sounds a bit underpowered. From reading through Sparkfun’s tutorials like [Battery Technology and [powering a 5v/1a lipo it sounds like two LiPo’s (through I’m sure open to suggestions) or a [7.4v LiOn battery (but i don’t know what charger to use or regulate it) could be a nice solution.

    Can anyone suggest which sparkfun boards + charger I should use for this?

    Thank you!](https://www.sparkfun.com/products/11856)](https://learn.sparkfun.com/tutorials/sparkfun-5v1a-lipo-chargerbooster-hookup-guide)](https://learn.sparkfun.com/tutorials/battery-technologies)

    2

    While we don’t have any multi-cell battery boards you can check out our LiPo battery chargers here: https://www.sparkfun.com/categories/421

    You might be able to get away with single cells hooked up to their own chargers. I would suggest the following charger: https://www.sparkfun.com/products/13777.

    If you want you can also use the following if you want a more robust solution: https://www.sparkfun.com/products/16793

    Again, we don’t support multiple cell chargers so use at your own discretion. Make sure to do plenty of research into your batteries’ charging characteristics before final application.