[HELP] WF-800 3W Cree problem

[Loobz]

Hi,

My WF-800 3W Cree Q2 LED Flashlight fell onto concrete from a height of about 2 feet. Now the flashlight will turn on, but seems to be only giving half the lumens. the 2 x 18650 batteries were inside at the time. Where should I start looking for the source of the problem?

thanks.