Ah, yes. I also have a heap of defunct flashlights around. Took me a while to find some good ones. My modern preference: One of the Olight Baton series. I've g

Ah, yes. I also have a heap of defunct flashlights around. Took me a while to find some good ones. My modern preference: One of the Olight Baton series. I've got an old one (I see the new ones even allow recharging batteries without removing them). The magnet in the back can be really useful if you need an improvised stationary light for working in the dark. Also, if you need a detachable front light for your bike: Consider the Busch & Müller Ixon IQ Premium. This is the only sane detachable front light I was able to find. It provides enough light (10 and 80 lux, a rarity nowadays) and runs on replaceable batteries with a standard form factor (AA) that can be recharged without taking them out.