Hi Wikiwide, sorry for the late reply. I bought 3x of the batteries over time and 1x failed. I have reason to believe the cells are anything but as reliable as a super high-tech li-ion cell can be. That is, a random failure.

The Polarcell people have been really good to deal with so far, quick email responses. It has also been mentioned here that they could even be the same cell as the 1500mAh Blue Dream Scud (where do they think these names up?)..