I bought the Panasonic 3100 MAH (single protected) NCR18650A batteries (Grand) and each charge will give me more than four times the life compared to the AW IMR 18350 batteries (VV Grand).......................Apples and seedless red grapes.
I have used the AW IMR 18650 batteries and the NCR Panasonics and I haven't noticed a difference in power.
The NCR Panasonics are cheaper and last twice as long as the IMR AWs.
I did notice that the Panasonics did out power the AW IC 3100 MAH 18650 batteries.
I'm impressed with the Lithium Cobalt technology that the NCR Panasonics are using.
The Panasonic NCR platform was tested as one of the best performing cells by CandlePower forum.
Most of the highest performing 18650 batteries that they tested were the NCR Panasonics that were re-branded and PCB'd by other manufacturers.
The Panasonic IMR and hybrid batteries are closely matched to the AW IMR cells.
Unfortunately,Panasonic doesn't offer 18350 batteries.
I wouldn't hesitate to buy the Panasonics especially at that great price.
Seeing that the REO's are made to fit the AW IMR batteries I tend to stick with them. I am wondering the length on those Panasonic you are using. I am thinking that your spring is probably compressed way to far to be able to collapse. I may be wrong, but until I see pics of any other battery in a REO I will stay far away.
To me having the short protection offered by a spring that can and will collapse is worth more than a little more battery.




