well two of the places you mentioned DX and buyincoins i have tested bad TFF batteries, Manafont sofar for me in the only place ive tested good ones that test close to or above the claimed mAh even when used and i have mentioned there up sides, down sides and there IR, it's all here for you to see.
i too have used the same charger as you WP2 2 i brought it for my old man as a gift i tested it for 2 days straight before giving it to him, you can not realy tell a average cell from a good cell due to the way it charges ramping down and it will under charger all batteries (better then over charging).
ive see people recomend batteries on here and not even notice they are not protected or under perform, but i say buy what you can afford from where you want, just in my expernice i have had no luck with DX TFF and no luck at all with any type of battery and a couple of crapy torches from buyincoins.
since i have some very basic equipment to test the batteries i thought i would make a post about it as ive seen the TFF get a hammering latley and not just quess and say yeah they are good, i have spent well over 60 hours doing these test on this thread and if it helps one person to decide to buy or not to buy these batteries with the infomation on this thread its been worth it.