SL 4AA 7 LED with NiMH? ...not now.
- Thread starter ikendu
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eluminator
Flashlight Enthusiast
Yes, you can use NiMH. They actually draw less power from NiMH than from fresh alkalines. I measure about 630 ma and 5.5 volts from fresh alkalines. 520 ma and 5.0 volts from fully charged NiMH. The LED's appear to have 12 ohm resistors in series with them.
I guess this is the poor man's LGI. Half the price, but half the lumens? I guess not, but still impressive.
I wonder how long those poor LEDs will last at this power level?
I guess this is the poor man's LGI. Half the price, but half the lumens? I guess not, but still impressive.
I wonder how long those poor LEDs will last at this power level?
eluminator
Flashlight Enthusiast
I should add that the NiMH I used have been sitting around for a few days since they were charged. If you use NiMH directly from the charger you will get more power for a few minutes.
I'm guessing they won't put out more than alkalines though. The most voltage I've gotten from NiMH fresh from the charger is 1.4 volts.
That would be 5.6 volts to the flashlight versus 5.5 from alkalines. And the NiMH would probably drop below 1.4 volts very quickly under such a load.
I'm guessing they won't put out more than alkalines though. The most voltage I've gotten from NiMH fresh from the charger is 1.4 volts.
That would be 5.6 volts to the flashlight versus 5.5 from alkalines. And the NiMH would probably drop below 1.4 volts very quickly under such a load.
