I acquired the Rayovac keychain light 1xAAA indestructible. The plastic light goes well with my phone because unlike all these aluminum key chain lights it can not scratch my phone, it is somewhat too cumbersome for the keychain though. 20 lumens of ideal flood provides a good light close up including an impressive minimal range of only 1 inch, the best minimum range of any flashlight I own. Clean white light for a 5mm LED. 20 feet range in pure darkness, it is also one of the only full featured mini lights I've ever seen, in that I mean it has a rooll stop, tail stand, lanyard, face-stand-on indication, as well as the possibility of momentary on even though it is twist-on. IPX4 rain proof, dust resistant, and also, 30 feet drop tested making it invincible. Resilient light really. 1.5 hours at 20 lumens, after that another few hours of decreasing light. Comes with the battery at $6 in stores.