I bought the following UPS module for my Raspberry Pi: Power Pack Pro
The module kinda works, when I unplug the power cable, the module instantly switches to battery powered mode without restarting the Pi. Also the I2C output works, I am able to read the voltage of the battery.
BUT: It cannot provide enough power for the Pi. The lightning bolt is there 99% of the time. It disappeared in absolutely random times, even during a CPU stress test.
I tried the followings:
- with 3 different Pi 3 and 3b+
- multiple charging cables (which are totally fine with normal usage)
- 5V 3A charger
- tested the UPS board with a fully charged battery (+ external power), without a battery (only external power), and with only a battery (without charging), but still the same
- the module also has a micro usb out, so I bought a male-to-male cable. It looks like the output voltage is 5.0V which even drops when I power up my Pi.
After these I contacted the seller and asked for a replacement board. I got one. The new one has all of these symptoms.
(I even asked a YouTuber if he has the similar problems, but he said no. Other reviews were also positive)
The reason why I ask you about this problem is I found out my board has different chips than what displayed on the official wiki.
Photos of my board: drive
I was able to read (sort of) the numbers from the chips:
- U1: IP5306 20HG00FA(?)
- U2: ETA1096 6312F
- U3: LM393 SSM FK52
- U4: 2015CS AD9T8H(?)
I'm a beginner in electronics, but I can't think of anything else but I have these problems because of the different electronic parts. Can I make a working module by resoldering different (working) chips into the board?
Edit: (note) the module is no longer for sale.
Edit 2: I made a comparison image of the advertised/received boards: image
- The U1 chip is different. The others look like they're the same.
- The 2R2 inductor is flipped, but if I'm correct, that's not a problem.
- Some capacitors are changed to ceramic ones.
I hear some static noises under use, but I can't tell what is the source of it.