Sometimes the light will just die. I have to turn it off and then on again. But once it starts doing it, it gets quicker and quicker until the light only flashes when I turn it on. Very, very frustrating. I have actually replaced the light once. The replacement does it too!
Camping, Backpacking & Hiking - Makita - 18V Lxt Lithium Ion Rechargeable Flashlight BML185
Answers & Comments
I had exactly the same problem. Bypass the circuit board. It's not needed. http://www.fixya.com/support/t15194423-remove_case_head_from_makita_bml185w