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)

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.

Been running for a couple weeks now, charged great, let it run down some, plugged back in charged back up, repeated. So far works flawlessly. Going to be "torture testing it" for a bit before I deem it "perfect".Documentation stinks, but there is a website you can go to.It's very difficult to install incorrectly.

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.

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 used this on my pi 4 and it works well enough. The battery gets charged via a micro USB cable which is a bit of a downer but it works well enough. It does have a USB c port, but that only directly powers the pi. As far as I can tell it doesn't charge the batteries. Speaking of the batteries, the ones I have either must be oversized for standard 18650s or the holder is a bit small because they were a bear to get in and have a want to pop back out.I had my pi 4 running with this for a couple days and decided to test the ups feature. I unplugged the charger and it seemed to work well. The pi didn't power down, so I plugged it back in and went on with my day. Several hours later I went to use the pi and it turns out that the charging didn't resume when I plugged it back in. I have since repeated the tests and got the same results.All in all, it does what I want it to do mostly. The script that reads the data from the bord can use some help which I may fix for my use case in time but I'm good with it so far.

I have 7 Raspi's running within 10 feet doing astrophysic simulations on the Artemis-Falcon9 flights. DISCLAIMER: I am not with SPACEX. Each Pi-system has add on external disks and cooling fans. I have more Pi's running in other locations. I am not a complete novice with Pi's. I burnt up the MakerHawk UPS board. It's DESTROYED. I did it, and I am responsible. I don't want my money back. BUT the lack of documentation and support I feel caused this. The device uses a ina219 to display volt and current, but WHAT VOLTS-WHAT CURRENT. The MakerHawk is NOT a IPAD that just listens to music. Developers incorporate it into systems and need documentation. From reading other reviews, I "GUESS" the system is too sensitive to the input voltage and will not charge unless well over 5V. I could not find a way to determine if the UPS was on bat or USB power. Wait for Model 2.0 or maybe Model 3.9

I just bought it one week ago. The power indicator is not accurately reflect the power left in those batteries when charging and consume the power at the same time. My situation is the input power < consumed power and run for a long time and the pi runs out of service eventually. The power indicator has three blue led on and one keeps flashing, but when I ejected the battery and put it back, it has only one blue led keeps flashing.Also, it would be better to allow the user turn off the led of power indicator e.g. double click the power button.Noted that this model EP-0114 cannot measure the voltage of the input so that you can‘t get the value of it with software. If you need this feature, you need to buy newer version EP-0118.

Shuts off the pi randomly, the battery drains with no power outages. Junk.