MakerFocus Raspberry Pi 4 Battery Pack UPS, V3Plus Expansion Board with 10000mAh Battery, Type-C Interface for RPI 5 4B 3B+ 3B 2B+

I’m giving it five stars cause it does what it’s supposed to do. I’m the idiot who has a pi 5 and wanted it to supply enough power with amps and it doesn’t barely supply enough power to power the five alone, the five and a screen and any peripherals or run any programs the five just shuts down because it’s not supplying enough amps but on my 4 b model, it works great power, the screen and everything

I replaced their original version 1 UPS with this new V3P version. It cleared all of the low voltage warnings I have always gotten with the V1 circuit. My Raspberry Pi 4B is loaded with a 4-Port USB to RS-232 Serial Adapter Hub, two RF wireless USB mice, and its Pimoroni Fan Shim cooling fan. Running OpenCPN navigation program, no problem. During my boat's diesel engine 600A start, pulling battery voltage supply to the board to very low, the UPS powers the RPi and its loads with no interruption or reset or Pi low voltage warnings. This upgrade to deliver a max output current of 3A, just like the official RPi AC wall plug power supply, has made all the difference. FYI, I supplied both the old and this new board from a 12VDC to 5VDC Dual-Port USB Car Charger Adapter, 4.8 Amp, 24W, using a Dual USB Male Jack Y Splitter Data Charger Cord to supply the two 2.4A channels in parallel as 4.8A to this UPS circuit. That is, supplying 5 x 4.8 = 24W to the board enables it to deliver 5.1V x 3A = 15.3W output power to the RPi. With the old V1 board output under load was 4.8-4.9VDC. With the new board it is 5.2V+. Perfect!

Electrically exceeded expectation, works very well.The documentation is spread all over the web. There are Python programs to read the status of the UPS, etc. on Github, under another makers name. Amazon won't let me post a link.Bottom line: I would buy it again.

Nice form factor to add battery capability to the RPi. Does not arrive with a USB to microUSB that you will need to attach it to the RPi, not a deal breaker but make sure you order one, you only need 2' but something at 6" will increase your flexibility. Also this will not charge itself so you still need the RPi charger. Nice little board and works with the RPi board. This does not come with the clear plates in the pictures, but does have standoff hardward to mount it to the RPi. Very nice, I have not taken it on the road yet so I do not have run times for you.

I bought this to power a Raspberry PI which in turn powers an Arduino. It certainly powers everything. It doesn't take more than a couple hours to reach full charge when plugged into an outlet. That said, it doesn't last very long, I get about an hour of power depending on what I am doing. It's also rather large and bulky so if your form factor is small, note that you will need much more space to facilitate the battery. The board is about the size of a Raspberry PI, slightly smaller, and only as thick as a circuit board. However the battery is much larger and awkward. It won't easily stack with the PI unit and the board, so it needs an additional larger space to facilitate its storage.There is a port at the end of the board to incorporate a power switch and that even reserves two pins for an LED, both of which I utilized well. There's also built in USB ports for ease of use.Basically It's a solid unit that does what it's made to do, but it's bulky and doesn't provide power for as long as you would expect for such a large battery. Regardless, I used it successfully for a project.

I was really excited about this power module, but it has two flaws, one major, one not as big of a deal but still an oversight. First the big one: It does not have any low voltage protection for the Lithium battery. If you leave your Pi running, it will eventually brown out, however the circuit does not shut down to protect the battery. You can see the LEDs pulsing as it is trying to stay alive, far below a voltage it can operate at. The major problem with this is, it will absolutely kill the Lithium battery if you allow it to do this more than a couple times, as they cannot handle a deep discharge. I measured the cell after it had been left on overnight, and it was at 2.78v. The second problem is when you have it powering your Pi and also plugged in to USB to charge (which it will if you supply it 2.5A source), when you unplug the charging source, it briefly interrupts power to the Pi causing a reset. I feel like this could be easily solved by the circuit designer. If you're just looking for a battery backpack for your Pi to run for several hours, this will totally do the job, but dont plan on leaving it sitting around on battery, as it will eventually kill its' own battery from deep discharge.EDIT: The manufacturer contacted me and let me know they revised the board to fix these two issues, and they sent me a new one. It now doesn't drop out when unplugging or plugging in. Also it does properly shut down the circuit when the li-po gets down to 3.2v.