For $25 you have a good number of options:
As a few have mentioned, Fenix is coming out with the
E01 for $15. If you want something smaller in size, you may want to try the Photon Keychain lights. I carried
Photon Keychain lights for many years ... from their Photon II to Photon III to Photon Freedom. The Photon Freedom spits out a good amount of lights for small size, and the recent model is 100% brighter than my older model. Photon also has the Rex light, which is bigger than the Freedom model, but comes with 4 super bright LEDs and here's the cool part ... it comes with Li-ION rechargable batteries. You could use standard batteries to recharge it. You could buy Photon directly from their website, or google it and find cheaper price elsewhere. (I think I got mine at batteryjunction).
Side notes on the Photon Rex ....
* It's many times brighter than the photon freedom, and as a backup light, it's pretty darn bright.
* I tested out the runtime and at fully charged, the batteries last for about an hour before going bye bye
* Charging time is about 2-3 hours
What I don't like about the Rex:
* The glow in the dark button make it look and feel cheap. I'm not a big fan of it
* It's bulkier than the Photon Freedom (that's why I haven't jumped to switching it)
* The charger is simply two wires with rare earth magnets on the ends. It's small, and you could easily lose it, hence it's best to keep it with your Rex. This adds the bulk, and also I think it will raise an eyebrow if you ever go through security at the airport with it.
Good Luck