How can I continuously run a 3W - or less - LED light with +/- 350 lumens as long as possible (1 year minimum) with a relatively compact battery source? [more inside]
posted by xod on Nov 14, 2012 - 18 answers

I'm doing a craft project and would like to install two red LEDs that are powered by a battery pack with an on/off switch. I would love your opinion-advice on what to buy and where to buy it. [more inside]
posted by komara on Jan 25, 2012 - 12 answers

Where in Los Angeles (or within an hour's driving distance) can I get a whooooooooooole bunch of LR41 batteries on last-minute notice? [more inside]
posted by mykescipark on Dec 30, 2008 - 8 answers

Powerbook G4 (hardware?) woes, followed by death of battery LEDs. [more inside]
posted by Monstrous Moonshine on Nov 4, 2008 - 4 answers