Re: Anyone use a 9 volt battery \"Pak Light\"
I own, use, like and recommend this light.
Most folks seem to be really negative on it. Too expensive, too dim, too frail, too..... When I could get an answer out of the nay sayers (not often), they admit that they've never actually seen one....
It's a 'cottage industry' product, made by a family living off grid. Well made, first rate parts, IMO.
On low it's one mA. This means the 'factory' battery (Li nine volter normally found in smoke alarms) really will run 1200 hours. Honestly. And it honestly is a dim but useful level of light. On high it's 16 mA (per LED), very close in brightness to the Arc AAA or Infinity Ultra but with less artifacts due to the dual sources. Battery life will be closer to 1200/16 however. Vf at low is under six total, just a bit over it on high. Resistors are 150 ohms for high with an extra 3000 for low. On the 'factory' battery not only is the weight way down, runtime way up but the flat discharge voltage makes a regulator unnecessary. Indeed, IMO, a bad idea given the otherwise very simple, robust light. Performance on alkaline batteries is OK, of course. But on Li (or even NiMH) it's stellar.
BTW, they're tough. Mine's been through the wash twice now. It's easy to miss in the bottom of a pocket without the battery clipped on.....
Doug Owen