But, you know when they say 4 hours they mean 3 or 2 in real life usage, especially with AA rechargeable batteries, and probably like 10 min with regular AA batteries. Useful in extreme emergencies tho, when you have no power no rechargeable batteries and only a lot of regular AA batteries to waste (these also get very hot when used like this, they may explode or leak as has happened to me when using them in high drain devices
).
