Battery backup/POWER IDEA

Discussion Raspberry Pi
1

Hey guys Im 99% sure that pimoroni makes what Im looking for, but at work the search function doesn’t work and displays garbage in the shopping ares, so I cant find it, but heres the deal.
Building a laptop/tablet hybrid. Pi4 and 10" screen (maybe larger in the end)screen wants 12V.
I had a battery made and everything works GREAT, using a buck/boost converter to drop down to the RASPI.
BUT in my current design I have a slider switch for BATTERY/AC power, but every $49 tablet at walmart has the ability to charge the battery while running the tablet.
In another forum I was recommended a hat like THIS:


and was told that PIMORONI makes one.

But heres the queston I cant get answered. See I own the one in the link, its far less than great, but for my cell phone projects it works pretty well.

HOWEVER as I said, my battery outputs 12V, to be exact its an 18000 mAh 12V Li Ion battery pak. It will run the Pi4 and screen all day!

But I don’t know that much about batteries and charging, but simple math says taking something as big as mine and plugging it into something that normally takes a 4850mAh 5V battery, is just NOT going to work.

Any and all advice is GREATLY appreciated.

EVEN if you have a lead on a 10-12" 10point touch screen that runs at 5v for under $150

thanks

2

The only thing we sell that’s close to that functionality is the Adafruit PowerBoost, but’s designed for 3.7V LiPo batteries, really.

3

Sandy,

Thanks for the tip, now here’s the question that I probably already know the answer to, but since I know I don’t KNOW the technical side of it, IM going to ask anyway.OK, 2 of them…

  1. SO if I bought the powerboost 1000c I’m imagining that I can not then plug my battery into it to charge/discharge the battery through?

  2. I know that one of the boards I looked at, again Im at work so I cant see any of the details about yours, actually had a second port on it, so you could effectively plug 2 of the recommended batteries into it, so if it came with a 4850, you could actually plug in 2 4850s and extend the charging time. DOes yours do that?

Thanks for your rapid reply