Green Laser recomendations

I'd like to purchase a green laser pointer to help my novice astronomy friends identify constellations etc..
My experience with green pointers has been their hungry power consumption.
AAA batteries last about 20 mins. even using Energizer Lithium.

Recomendations?

Thanks
John

John, with a little ingenuity you can repackage the laser heard into a tube (flashlight or other) which accepts C batteries.

George

I've owned/used a couple of Howie Glatter's green lasers for several years, they've been reliable and batteries seem to last forever. One drawback; the beams are so impressive that some observers are more interested in where to buy one than with what I'm trying to show them. I had paid more for brigther versions but I'm sure his standard Starpointers work just fine. Batteries do last for years with monthly use.