the wrapper on these "black panas" s*ck. it has to be the same plastic wrapper quality as XTAR batteries. the wrapper becomes brittle after a few months and BREAKS.
the "transparent panas" wrapper is thicker and softer, seems like. should last much longer. i heard from people who dismantled them that the transparent wrapper is of really good quality.
i will never again buy XTAR cells. their black wrapper is cheap stupid ****.
yes, the transparent panas are long cells. at least 69.50mm. some up to 69.99mm ;)
A lot companies use black wrapper: AW, Keeppower, Eagletac, XTAR, Orbtronic, Callie's Kustoms. I have only 2 XTAR 2600mAh (for about 1,5-2 years - group buy here in the forum) and they look good.
Maybe you get a bad pair or XTAR use a better quality at the beginning.
i got the same neg experience with black wrapper of Eagletac 18650.
maybe it's the dry air around me. same happened to the black rubber of my chinese pinpon bats. the stuff ages, loses its flexibilizers, gets dry, brittle and breaks.
i will report how well the transparent wrappers survive in my dry environment.
Out of the two of the above that i have in host xm-l direct drive these r the only ones that trip the pcb,the sanyo 2600 18650f,xtar 2600 18700 do not trip .Dont really know why.
Does meanwhile already got someone these black wrapped Panasonic? Are they good? I’m thinking about ordering some pieces, because they are way shorter then the others