I noticed it contains a non-removable NiMH battery. The infrequent charging it would likely receive would mean it sits there month after month with discharged cells that will likely loose their effectiveness early. Rechargeable does not mean eternal. Even First-Alert rechargeable flashlights permit replacement of their proprietary battery packs.
<edit> Oops! I noticed it does permit recharging from a wall wart transformer. There may be some that would keep it charged up after all. It's non-removable battery pack is still enough for me to bypass it. <edit>
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by JonSidneyB:
This just seems a practical way of having light where and when you may not have many batteries, or want to keep the batteries in your tactical light fresh.<HR></BLOCKQUOTE>
I don't think the nightstar is 3.3 volts, but then again Im not sure. I kind of like the Sherpa because you can plug it in and charge if you like, when the battery is dead, crank it up. It's the size of a large bar of soap, just right for the glove box. And when you need serious light, draw a Surefire.