I now have some ENERPOWER 2600mAh batteries of Enerdan and you have to say it's my favorite battery. What you get for your money here is really good. Use example 4 pieces of the variety in the Fenix TK75 and it lights up and glows and lights ... One should only remember that it is not the thinnest battery, and in some lamps do not really fit (eg in the Zebralight H600 MkII - but that is also more likely in the very very thin battery tube). As for the shrink tube, I find, are there very insensitive batteries. Compared to some other brand more durable (with a different brand of coat was torn after a few switching from one lamp to the PCB).
For service of Enerdan: Once in a supplied battery the label was wrong accidentally stuck around (plus and minus marking confused). For me it was no big deal, I pulled off the label, turned it and stuck it back on ... but a corner was not quite hold on the round battery. After a brief email to Enerdan I got immediately a new label and sent the matter was settled. I think, is a great and uncomplicated service I necessarily would like to mention here! Thanks and keep it up.
My conclusion: If not necessarily very thin dimensions are needed is my first choice "ENERPOWER".
