This X5 lookalike is bought at Ap Liu Street, Hong Kong at just US$4 /ubbthreads/images/graemlins/grin.gif. The finishing of course is not as good as the real Inova X5. But I like the use of AA x 1 rather than the CR123 x 2. AA battery is more easily available during travelling and is much cheaper. Also the size is smaller because the use of AAx1 and more important to me : it can use Ni-MH rechargable. /ubbthreads/images/graemlins/grin.gif
Both flashlights are around 1 foot away from the wall. ARC AAA has more side spill while the X5 lookalike has tighter angle. I don't have a Lux meter, the output of this X5 lookalike is higher than the ARC AAA.
This is my measurement setup :
From the data and curve, I guess that it is just a single transistor oscillation circuit without any regulation, most likely at such low price /ubbthreads/images/graemlins/icon3.gif.
The advantage of without regulation is that you can use higher voltage battery, such as lithium AA at 1.7V to boost an extra output. In such case 2 lithium AA will cost higher than this flashlight /ubbthreads/images/graemlins/broke.gif.
Both flashlights are around 1 foot away from the wall. ARC AAA has more side spill while the X5 lookalike has tighter angle. I don't have a Lux meter, the output of this X5 lookalike is higher than the ARC AAA.
This is my measurement setup :
From the data and curve, I guess that it is just a single transistor oscillation circuit without any regulation, most likely at such low price /ubbthreads/images/graemlins/icon3.gif.
The advantage of without regulation is that you can use higher voltage battery, such as lithium AA at 1.7V to boost an extra output. In such case 2 lithium AA will cost higher than this flashlight /ubbthreads/images/graemlins/broke.gif.