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100% of customers would recommend this product to a friend (1 out of 1)
Involvement Level: Expert (understands the inner workings)
Pros: As it says is a 5-mode driver supplying arround 1A of current.
It works fine from 3,7 to maximum stated voltage.
Cons: It does not work properly with voltages lower than 3,7V.
On flashlights with one LiIon cell it will dim as long as the battery voltage falls bellow 3,7V.
The soldering quality is not the best but I can live with this. Is good enough to make it work reliably.
Personally I don't need the SOS mode at all. The strobeis of some usefulness if I use it as a front light on my bike, but I have another light fot this purpose.
Other: It is not a bad circuit, it works fine if you use it with supplyes of 3,7 volts and above.