I’ve carried a Photon keychain light ever since my dad gave me his old beat-up one, which I nurtured back to health (read: replaced the batteries). We’ve talked about the Photon micro-light on Toolmonger before, but this new version is insane, with four LEDs, adjustable brightness, and four safety modes including strobes and SOS. Best of all, it’s rechargeable, and it can even recharge from a normal AA or D battery. You can recharge the Photon’s Li-ion cell 500 times, and you can get 20 charges from a single D cell.
Ok, it’s a little steep with a list price of $30, but street pricing is closer to $20 — and keep in mind, that’s money you wont be spending on batteries. If somehow you figure out how to bust it there’s also a limited lifetime guarantee so you won’t have to lay out the cash for another one.