MakerHawk Raspberry Pi UPS Power Supply Uninterruptible UPS HAT 18 650 Battery Charger Power Bank Power Management Expansion Board 5V for Raspberry Pi 4 Model B / 3B + / 3B (Not include battery)

The mounting hardware is finicky; using tiny little nuts for the Pi side is very annoying and they are hard to get on without small tweezers and a lot of patience. Seriously using MicroUSB input in 202X is a dealbreaker; not to mention one with some ungodly insert with a PM chip in the middle required, thus needing two micro cables and a 3A USB A power supply (seriously, couldn't have even put USB-C on here?). I expected to be able to supply power through the inclued USB-C port, given that USB-PD is bidirectional, but this does not work, and thus this is clearly not USB-PD (even just 5V PD). This has already ruled this out as a viable option for me as I run my Pi very "hot" under a lot of load and there's no way a single MicroUSB or USB A charger will provide enough power (if you know of a 3+A-per-port A, I'd love to know). For $15 less I can get the PiPower which takes USB-C in (able to reuse the existing Pi4 charger I have) and even includes batteries (something to also factor in to this units already-higher price).

That product illustration where they connected USB-C on the battery controller to USB-A port on Raspberry seemed weird to me until I figured out why they did so. Raspberry PI 4 complaints about low voltage unless you do as instructed. RTFM, indeed. I've got two of these devices and will not hesitate to recommend them.

Funciona bien, lo compre para un raspberry y dura tres horas, suficiente autonomía

Used my Samsung 18650’s, (I’ve had them for a while and have used them for some time, with other projects.) right as I was ready to install one of them, I casually took a look at the board components just to check that everything looked okay and nothing blown or melted. Immediately I seen these two parts (voltage regulator modules if I had to guess) were melted. Against my better judgement I went ahead and plugged in one cell anyway. Instantly this board started smoking and set off my battery into a fun little fireworks display. Of course, the board is completely useless after this happened. I can’t request a refund anymore because the refund window closed a day before I received the delivery. How convenient… I should’ve taken a photo of the board after the whole event happened, but it obviously wasn’t the first thing in my mind. Two stars just because it’s a great concept to allow the use of a battery for the Ras-Pi.

I decided to save $10 on the older version as it was only used as emergency power loss protection. The problem is the old version will NOT function as a standard UPS. It will 1st charge the batteries, then run off the batteries alone until they are dead and shut down the PI. This happens with external power on 100% of the time. I can only see this version used to run exclusively off the batteries only. I ended up returning the older version and forking out the extra $10 for the latest version which I am expecting to work perfect. Only time will tell.