Hi guys!
I have got a LED-LENSER V² three A and a LED-LENSER V6 Power Chip.
In fact they are both the same with the simple difference that the V6 is made of stainless steel while the V² consists of aluminum.
Now I have tested the V² with NiMh batteries. The batteries have a capacity of 750 mAh (my battery-analyzer says they have between 730 and 780 mAh).
Now the really interesting thing is that the LED is a 1,25W luxeon LED, which normally is run with 3,6V and 350mA. When using alkaline batteries the amperage rapidly decreases from at first about 1A to about 500mA and later to less than 200mA.
But when using NiMh batteries (they have about 1.4V in the beginning) the amperage counts 1.8 A (!!!) in the beginning and after a few minutes it decreases to 1 A - and that's it! It stays at 1 A until - after about 45 minutes - it drops rapidly because of low batteries.
The fact is that the flashlight becomes so hot, that you cannot touch it for a period longer than a few seconds.
I have written to Zweibrüder about this problem and they answered:
I don't only dare that the LED will not stand this "challenge" for a long time, but I also don't like the extremely high temperatures and the fact that the batteries are low after this short time!
Has anyone of you made any experiences about NiMh batteries in LED flashlights?
I hope I didn't make too many mistakes - I'm German
Greets
McDV
I have got a LED-LENSER V² three A and a LED-LENSER V6 Power Chip.
In fact they are both the same with the simple difference that the V6 is made of stainless steel while the V² consists of aluminum.
Now I have tested the V² with NiMh batteries. The batteries have a capacity of 750 mAh (my battery-analyzer says they have between 730 and 780 mAh).
Now the really interesting thing is that the LED is a 1,25W luxeon LED, which normally is run with 3,6V and 350mA. When using alkaline batteries the amperage rapidly decreases from at first about 1A to about 500mA and later to less than 200mA.
But when using NiMh batteries (they have about 1.4V in the beginning) the amperage counts 1.8 A (!!!) in the beginning and after a few minutes it decreases to 1 A - and that's it! It stays at 1 A until - after about 45 minutes - it drops rapidly because of low batteries.
The fact is that the flashlight becomes so hot, that you cannot touch it for a period longer than a few seconds.
I have written to Zweibrüder about this problem and they answered:
Translated he says, that because of the good cooling-management of the flashlight it is no problem for it. But he also thinks that this high amperage only lasts for a short time. And as I found out this isn't true!Wie Sie bereits feststellen konnten liegen mit Akkus kurzfristig maximal 3,9 Volt and der LED an.
Diese Spannungsgröße sinkt bereits nach kurzer Zeit auf einen Level von 3,4 bis 3,6 Volt ab. Hierbei treten maximal Ströme im Bereich von 280 – 490mA auf.
Die LED ist diesen Ansprüchen, bei einem guten Kühlmanagement, wie es bei unseren V2 LED LENSERN gegeben ist, gewachsen.
Das heißt mit anderen Worten, Sie können Ihren V2 LED LENSER mit NiMh Akkus betreiben.
Sollte sich dennoch einmal ein Schaden ereignen und Ihr LED LENSER dann nicht so aussehen als wenn er gerade von ein LKW überfahren wurde, werden wir Ihren LED LENSER auch über eine gesetzliche Garantiezeit hinaus, reparieren bzw. tauschen.
I don't only dare that the LED will not stand this "challenge" for a long time, but I also don't like the extremely high temperatures and the fact that the batteries are low after this short time!
Has anyone of you made any experiences about NiMh batteries in LED flashlights?
I hope I didn't make too many mistakes - I'm German
Greets
McDV