Down on SideWinder's Emergency Cell Phone Charger

Joe from bookofjoe isn't particularly happy with one his recent purchases,
SideWinder's Emergency Cell Phone Charger:

I tried my new SideWinder out yesterday with my Nokia 8260. Yes, I know, I was supposed to switch to my new Sony
Ericsson T630 this past Monday, but it just didn't happen. Anyhow, when the "Low Battery" icon came on and the phone
started its beeping aka death rattle, I plugged in the SideWinder, and called someone. I warned her at the outset
that there would be background noise (when you turn the crank on this gizmo to generate power, it sounds like a
grinder) from time to time. The product info says "six minutes talk time for two minutes cranking the handle." We
talked 20 minutes, I cranked at least half that time, and the battery suddenly died. Game over. Product failure.
R.I.P.