If you're still looking I've been impressed with Olight's baton range (Amazon amongst other places sells them, and there are frequent offers)- they have a magnetic base and a USB charger that just sticks on to it. It really depends on what sort of light output you're wanting - what you'll want for night walking over rough ground is different to reading a map at the roadside. The little usb chargeable key ring lights are bright enough for a lot of uses.