These are are fantastic. No, really, they are. They're very small but fit perfectly into the torch, which is lucky I suppose. Anyway, when they're in they work a blinkin' treat, they do. The light that comes out from them is, well, almost magical. Perhaps that's why they're called Mag Lites? I could point the torch straight ahead and the light meant I could see in the dark for several feet. It was great. And what's more, there were two of them - Oh Joy! I would defiantly buy these again, and I mean defiantly because I would fight anyone who disagreed with my purchase.