A simple little waterproof torch, with up to three LEDs (as required) giving a blue-white light. The batteries are built-in rechargeable by winding it up on the fold-away handle.
It will shine at maximum brightness for about forty times longer than the winding period, up to at least two hours, but by when it is noticeably dimmer. The claimed intensity is 50,000mcd, which is not really all that bright for a torch, but when you are changing a tyre in the dark, in the rain, it is a godsend, and you can be confident that you will always have enough light to see what you are doing. I used the handle to conveniently prop it up to aim the light at the wheel nuts.
It has two other modes; one LED on, and three LEDs flashing. The winder is quite stiff, and a minute feels like a long time, but there is the re-assurance that the work is not being wasted.
I bought it as a car-specific replacement for when my other (case damaged by dropping!)
3 LED Wind-Up Torch should cease to work. This waterproof 3 LED torch is not quite as bright, even when in three LED mode, but being now proven waterproof in rain and accidentally kicked into a puddle, it is still definitely a good buy.
Also worth considering is the wind-up and USB charge
5 LED Dynamo Torch which is significantly brighter than either of these other two.