I used to use these as bike front lights, but the vibration was a bit much and the front lenses would drop off. Many other uses possible.
Batteries are either 3 x AAA, or preferably 18650 3.7V Li-ion. There's a couple of batteries provided but I have mislaid the charger. Chargers are available cheaply from ebay.
Selection of generic bright LED torches and bike brackets (Bishopston BS7)
This offer has been gifted to someone and is no longer available.