I second the River Rock 1/2 watt 2AAA's at Target. I have literally dozens of LED flashlights (no kidding) and that Target one is the one I throw in my fanny pack for EDC. I have lights that cost considerably more, but nothing comes close in bang for the buck. The cost - size - brightness - quality - standard_batteries combo is unbeatable in this little light. Found at Target none the less!