Hmm, it appears as if actual magicshine battery packs are just as poorly built as their clones:

Magicshine battery failure- Mtbr.com


There is a distinct possibility that owners of the clones are more likely to complain about quality, because of the stereotype of "cheap chinese goods," whereas they're more reluctant to slam an established brand like magic shine.

This happens with bicycle frames apparently. If someone buys a workswell frame that's identical to a cervelo frame, there will be tons of trolls chiming in with "asplosion" comments left and right. Then, they all disappear after the bike is actually built and being ridden and enjoyed without any issues.