TP4056 X 4 charger PCB boards

I'm looking for feedback on this YouTube video and the PCB board file that this fellow has provided the file and links for. I ordered 10 boards so I can precharge the cells that I'm processing. Please comment.
I realize that there is no reverse polarity protection so I might have to add that so I don't fry the TP4056 by mistake.

I have a 5 volt power supply that can provide enough juice.


TheGerber Files are attachedin a .zip file

Can I get a opinion on these simple boards from some of you smart electronics guys on the forum? I ordered 10 of them to make a 40 cell parallel charger since I already have the other parts required to build a charge only board for my cell testing before the Opus testing. I have asked the YouTuber if he can add reverse polarity protection to the Gerber file. I will post some photos of the 10 board, 40 cell charger when get it put together.

Don tknow what to comment? Its a pcb board that holds the charger and some holders on same board

You can buy those prebuilt on Ebay and others as well. The good part is that you dont have to build that much.

Looks simple enough. And it uses the newer TP4056 board.
Although it has no reverse current protection as I built a prototype on that design and I already smoked one of the TP4056s.





I built one from Philipp Seidel's design and it works great. I'm bulk charging and have a major backlog of cells needing capacity checking.
The Diode Fuse design has already saved me 3 times.
https://blog.seidel-philipp.de/down...se-protected-18650-lithium-ion-charging-unit/




Reverse protection ideas herehttp://blog.deconinck.info/post/2017/12/22/18650-Battery-charger-reverse-polarity-protection

Wolf