TIP ... BUT ... If you buy separate battery "14500" 3.7V (available on amazon), you HALLUCINATE.
At the very least, you multiply by 3 the power of the lamp. The day at night, and I weigh my words.
The only downside to 3.7V, it consumes ++. So with these batteries is 3 times more light, but 3 times less autonomy (even as 1200mA AA).
Expect easy to 4 hours on a standard or rechargeable AA
Allow one hour of battery life on one battery 14500 3.7 / 3.5V
I bought five copies to give to the entire family. Nobody comes back, so much power in such a small size!
By design, I'd splash-proof and dustproof, shockproof and frankly.
It smells strong!
At this price do not deprive yourself !!