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Rezensionen (2)

21. Aug 2019
Original and everything works except USB3.0 is actually USB2.0
Product seems to be original. Everything works except USB 3.0 port does not work as 3.0 but as 2.0 (I am using Lenovo T420s laptop that has 1x USB 3.0 port).

08. Jan 2017
Seems that true CREE XM-L2 (new version) LEDs are used in this particular model. MAX Power is no more than 4W.
Pros:
+ Seems that true CREE XM-L2 (new version) LEDs are used in this particular model (unlike others that use old XML LEDs)
Cons:
- The electrical current for single (middle) led is only 0.75A, for all 3 leds together 1.1A. As the voltage under load when fully charged is approximately 3.9V, you get electrical power P = (0.75x3.9= and 1.1x3.9 = respectively)
Electrical characteristics (just measured up at my shop):
*Lamp uses two 18650 type Lithium ion battery cells. Nominal voltage: 3.6V, Capacity: 3600 mAh (unlikely even the half of that, but have not mesured myself), Configuration: Parallel (Voltage still remains 3.7V, Capacity increases to 2x nominal (2x3600 = 7200 mAh).
*Fully charged battery voltage (charged using stock USB cable hooked to PC USB socket) U = 4.11V
*Power when only one middle OR two side LEDS turned on P = 3.75Vx0.7A = 2,625 W
*Power when all 3 LEDs turned on P= 3.6Vx1.1A = 3,96 W
As you can see, this torch can pull max power of 4W and no more. Though a single XM-L2 CREE LED can operate at 10W (See in CREE(dot)com or Google by keywords ''XLamp XM-L2'').
It could be possible to use only one LED pushing it at 4W with a little heat sink and get this bulky torch lighter. On the other hand, this setup is dissipating heat through the LEDS themselves and thus the torch is not getting hot, just slightly warm.