just 5.7W max. at 4.1V, but this is very good for a little flashlight. I measured the current when using a fully charged li-ion battery, it was 1.4A at 4.1V = 5.7W in mode 1, that means 600Lm max.. In mode 2 it was 0.7A, in mode 3 about 0.33A. The current (and power) decreases significantly when the voltage of the battery drops, so I guess there is a cheap step-down converter build in. And there is no low-voltage cut off, what means if you use an unprotected li-ion battery it will die when the voltage come down under 2.75V !!!... but apart from this, the 5 modes works well and the design is nice (I will not say what it looks like...).

just 5.7W max. at 4.1V, but this is very good for a little flashlight. I measured the current when using a fully charged li-ion battery, it was 1.4A at 4.1V = 5.7W in mode 1, that means 600Lm max.. In mode 2 it was 0.7A, in mode 3 about 0.33A. The current (and power) decreases significantly when the voltage of the battery drops, so I guess there is a cheap step-down converter build in. And there is no low-voltage cut off, what means if you use an unprotected li-ion battery it will die when the voltage come down under 2.75V !!!... but apart from this, the 5 modes works well and the design is nice (I will not say what it looks like...).

just 5.7W max. at 4.1V, but this is very good for a little flashlight. I measured the current when using a fully charged li-ion battery, it was 1.4A at 4.1V = 5.7W in mode 1, that means 600Lm max.. In mode 2 it was 0.7A, in mode 3 about 0.33A. The current (and power) decreases significantly when the voltage of the battery drops, so I guess there is a cheap step-down converter build in. And there is no low-voltage cut off, what means if you use an unprotected li-ion battery it will die when the voltage come down under 2.75V !!!... but apart from this, the 5 modes works well and the design is nice (I will not say what it looks like...).

This is the replacement for Ultrafire model. The brightness is very high and zoomable head is perfect. I tested the flashlight with 3xaaa batteries and with 1x18650 battery. With 18650 battery the light is slightly stronger. Good purchase.

This is the replacement for Ultrafire model. The brightness is very high and zoomable head is perfect. I tested the flashlight with 3xaaa batteries and with 1x18650 battery. With 18650 battery the light is slightly stronger. Good purchase.

This is the replacement for Ultrafire model. The brightness is very high and zoomable head is perfect. I tested the flashlight with 3xaaa batteries and with 1x18650 battery. With 18650 battery the light is slightly stronger. Good purchase.