I have the tomorrowtop mini 7W 300LM CREE LED Flashlight looked at more closely.
Power consumption: after 1.5 Watt, while it does not matter whether you operate the flashlight with 1,5volt or 3Volt etc., as in the lamp a voltage converter is installed which supplies the LED is solid with the appropriate volts.
I can not imagine that the lamp is waterproof, because the "objective" (do not know how to describe it otherwise) the device is mounted with a metal ring on the lamp housing, which is relatively easy water / moisture is likely to penetrate me.
for the money still recommended, but not expect too much. 1.5 Watt Power Consumption is also very good!