tron3
Banned
This thread has excellent pics of the QIII with a regular and rechargeable battery. https://www.candlepowerforums.com/posts/1176152#post1176152
The rechargeable is clearly brighter, but I do not know if it is 3.7 or 4.2 volt battery.
Figures are based on peak battery freshness, and are slightly rounded down as I go to adjust for actual sustained voltage with use.
Here are my calculations. CR123 = 3.7v and R-CR123 = 4.2v
((4.2 - 3.7) / 3.7) * 100 = about 13.51% higher voltage.
We know higher voltage makes a bulb brighter, so ignoring the circuit in the QIII for a moment, we can expect about 13% MORE light from the little QIII.
:wow: Now, can anyone measure so we know for sure?
If I recall correctly, someone said the QIII actually emits about 60 lumens.
60 lumens * 13% brighter = 7.8 lumens. Rounding down, we get about 67 lumens.
Looks like we are a lot closer to that 75 lumen rating.
The LED bulb is 3w divided by 4v to get a current draw of 0.75a.
A R-CR123 at 4.2v is rated at 750 ma. Thus giving close to 1 hour of light. Maybe more like 45 minutes of desireable light. If 45 minutes is not a lot of time to you, clamp a binder clip onto a painful part of your body. Your sensation of time will change by 45 seconds. :mecry:
:lolsign:
The rechargeable is clearly brighter, but I do not know if it is 3.7 or 4.2 volt battery.
Figures are based on peak battery freshness, and are slightly rounded down as I go to adjust for actual sustained voltage with use.
Here are my calculations. CR123 = 3.7v and R-CR123 = 4.2v
((4.2 - 3.7) / 3.7) * 100 = about 13.51% higher voltage.
We know higher voltage makes a bulb brighter, so ignoring the circuit in the QIII for a moment, we can expect about 13% MORE light from the little QIII.
:wow: Now, can anyone measure so we know for sure?
If I recall correctly, someone said the QIII actually emits about 60 lumens.
60 lumens * 13% brighter = 7.8 lumens. Rounding down, we get about 67 lumens.
Looks like we are a lot closer to that 75 lumen rating.
The LED bulb is 3w divided by 4v to get a current draw of 0.75a.
A R-CR123 at 4.2v is rated at 750 ma. Thus giving close to 1 hour of light. Maybe more like 45 minutes of desireable light. If 45 minutes is not a lot of time to you, clamp a binder clip onto a painful part of your body. Your sensation of time will change by 45 seconds. :mecry:
:lolsign:
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