Ya, you got me there shadowww. :bigsmile:
Was thinking of the old AW cells. Missed the PD.
AW 2900mAh batteries use Panasonic NCR18650 cell, which has later got updated with NCR18650A (3100mAh) and NCR18650B (3400mAh) 
Yep, that’s them came about early 2009. I missed seeing the PD on the cells at fasttech. Went by the capacity even though I had reviewed the thread less than a week ago where they were announced at fasttech. Fasttech - interesting new products - Flashlights, chargers, batteries and DIY and knives - please no discussions.
A year or so ago the whole forum bought Rev Jim panasonic batteries for under 2$ each...They were old ...and are still really good .
The numbers on the batteries are
D
8517
I think the 20% a year business is crazy talk
it hasn't been my experiance at all .
I do agree Boaz,
It does have a lot of variables to consider.
For instance me and you both buy the same battery at the same time. I use and deplete mine daily over discharging it slightly with a discharge load of 4amps. I leave mine in my car sometimes during the summer. I charge them with a charger that’s constantly over charging them not following the proper algorithm with a charge rate of 1.5C. Drop it on the floor a couple a times a week. In a year I may have 365 cycles
You on the other hand charge yours on a proper charger following the proper algorithm with a charge rate of .7C. You keep yours in a controlled temp room of 70. You never ever drop yours. You use it sparingly with only a 1amp discharge load over a month. Before the battery reaches 3.5v at rest you pull it and charge it to only 4.10v. In a year you may have 12 cycles.
I did everything that causes a loss in capacity and life of the cell over a year, you did ever thing to extend capacity and life over a year. Same battery but two different environments.
I was assuming 20% was a lion cell be subjected to several cycles over a year and maybe some flaws in proper usage (a typical user). From my experiences I would say that 20% doesn’t apply to my limited use cells. That 20% statement is just something I read more than once on the net. But if you where a heavy user with very bad cell care I guess it would be feasible to reach that number quite easily.