The best £85 I ever spent was on an 18V Li-ion cordless hammer drill with two 1.5Ah batteries. True, it is only used for DIY, but it overcomes the problem of trailing mains leads, especially when up ladders, and makes "quick jobs" easier, as there is no need to find the nearest mains socket! We even have a cordless Dyson, bought when I got fed up with tripping over the ****** vacuum cleaner flex!