Originally Posted by
jsdavis
What I'm curious about is how my PDW is using more energy than my PB when it has two 0.5W LEDs and the PB has one 2W LED. Does this mean that the PDW is on more of the time during blink function compared to the PB?
Could be. Certainly, the rating of the LED has little bearing on how much power it's actually fed.
PDW claims 50 hours run time, this seems very optimistic considering that the battery seems to be half-depleted after about 6 hours.
They might measure run time on the lowest power setting with the most expensive non-rechargeable battery available. PB does seem to give reasonable, real-world values, but maybe PDW doesn't (I don't have any PDW lights.)
Also please check the below calculation for cost to operate...I think it's right but need someone to do a look over.
It's
minuscule. That should be close enough.
But your figures look accurate enough, once one realizes that "1520 mAh" is the four batteries added up.
Also, we really don't know how efficient the charger is. The applied voltage is more like 1.4 volts, but does your charger have a wall-wart (like my BC-900) that sucks power even when not actively charging? It will depend on how quickly you unplug it.