Review on Geekworm X728-A2 Stackable 18650 2-Cell Battery Holder (Without Batteries) For Raspberry Pi X728 UPS by Ray Sheptock

Ok to be honest I have a few of these and overall they work well and I love them so I ordered another one. Version 2.0. It looks like a complete redesign (look at the 1.3/2.0 photos and you can see the differences). THE BIGGEST DIFFERENCE THAT GOT ME A PROBLEM is that the BATTERIES are oriented differently than previous versions and of course I just pulled the battery out. Batteries out of the old and put them in the new and massive smoke. Yes, I wasn't paying attention, so this is a warning you should. On the other hand, CHEAP, SIMPLE DIODES might have prevented my problem. So now I have some cool looking paper pulp. I hope nobody has the same problem as me and I hope they add some diodes.