I ordered a few along time ago at this price as well when they had the special running. I don't believe that mine have been shipped yet though a number has been issued not long ago (all the details are at home).
I updated post #1.
My initial measurements of overcurrent protection were done on cell 2 only.
I later realized that one of the cells would not power my Flashlight that needs about 3A.
So I tested both cells and guess what! One cell 1 seems to be missing one MOSFET. It has half the current capability of cell 2.
Rather disappointing…
Update post #1
Added a picture of the PCB.
That cell being defective I decided to remove the clear heat shrink. The black cap fell of after that, revealing the PCB.
It looks like I was lucky to get them so quickly.
On almost all DX orders I get a defective item or an item that doesn’t match the description… I’m getting tired to ask for a partial refund!
Trying to debug the defective PCB, it seems that one chip on the PCB is dead.
The voltages are the same for both chips as they are in parallel. However under load on chip gets hot but not the other.
pin 1,2: Reads VDD; Connected to positive pole of the battery.
pin 3: VDD
pin 4: GND
pin 5,6: GND
pin 7,8: Reads VDD; Connected to button top (positive)
I have no idea what pin 3 and 4 are for. They are connected to capacitors. No idea why.
Can somebody help?