I bought one of these about 3 months ago, a single one, for roughly £6? I checked today and see that they now sell it as a double pack for £7.99. It's a superb little pop up lantern that just runs off standard AA batteries. On a single set, it lasts ages, no idea how long, but I haven't changed the batteries since buying it. I've mainly used it in places such as the attic, or using it to go to the shed at night etc, it's cheap and handy. Obviously not comparable to a torch, but it gives off a wide 360 beam of light, as compared to a focused beam, which is handy if you have tools etc in your hands.
2 Packs Collapsible LED Camping Lantern Flashlight - Sold by NEON Mart and Fulfilled by Amazon - £7.99 With Prime - £11.98 without