I rarely rave about a product too but this one is really ideal. I finally found a small reading light (a single AAA battery stick (not those horrible) Compatible button batteries with Eneloop rechargeable batteries), effective: lighting not too violent and perfectly uniform, hangs everywhere, adjustable in all positions usable with Ebooks, paper books or other use (style small screw has rolled behind a piece of furniture, and you can not do with big flashlight). Furthermore, autonomy is excellent, in fact I do not even know how much it is so it takes a long time can be 10, 12 15 hours? Whatever they may be, this is top.