Involvement:Expert (understands the inner workings) - Ownership:1 day to 1 week
With a battery 18650 weighs 160 g in total.
Rubber tape around the head soft and of sufficient length, the rubber part that holds the lamp excellent.
Very well siting on my head.
No memory driver with three degrees-300mA, 1600 mA - which is too much, and blinking is useless.
I replaced the original with
driver Sku 6190
http://dx.com/p/5-mode-1000ma-7135-circuit-board-for-cree-and-ssc-emitters-6190 so I have 40mA, 200 mA and 1000 mA.
It is a very simple operation.
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