I bought these as spare parts / insurance policy for my 3.1 tank. If the plastic tank on my Kayfun were to crack or break, I can now replace it with a sturdy solid steel one. It's also nice to be able to fit a standard driptip, although I am currently quite happy with the standard one.

Charging this battery took 820 mAh @ 5V. At a nominal output voltage of 3.6V and assuming a 90% charge and discharge efficiency, this means that the usable capacity is approximately 925 mAh.

Product defective after about 7 weeks (an estimated 250 hours) of use in an open lampshade.

It took 1367 mAh @5V to recharge, so the stated capacity seems plausible. The battery looks reasonably well built with no obvious problems. Would buy again.

I have been using these scissors in the kitchen for about a year now. Without a doubt, these are the best general purpose scissors I have ever used. The openings in the handle are sufficiently large (at least for my hands). As a result, your hands do not feel as if they are being constantly squashed in a vise. I can use these scissors for a long time without any discomfort. The blades are relatively short when compared with the length of the handles. The resulting high leverage means that little force has to be applied when cutting thick or difficult to cut materials. After a year of use, I cannot see any sort of wear. This indicates that the scissors will likely last a very long time. Unfortunately, these scissors seem to be discontnued.