Energizer lithium vs eneloops for long run time?

[batmanacw]

Which one would be better for long run time with a low drain LED?

I travel for a living. I never leave much of anything to chance so I tend to be pretty well prepared just about anywhere I go. Having several lights are part of that equation. All the lights I carry have pretty low level modes so I can get really great run time with the capability to run really bright if I need it.

Right now my back up batteries are energizer lithiums. I am using duraloops or eneloops for my work lights so I can charge them when I need to. So far it takes a long damn time before they need charged!

How do the lithiums compare to the eneloops for low level long runs? Cost is no issue.

Right now I carry a Nitecore D10, Fenix LD10 (in checked luggage), Fenix LD20, and a zebra headlamp. I carry 10 energizer lithiums in my carry on.

I am figuring that should get me through a couple months of survival usage if something bad happens and I have to walk home.....from California.

 

[csshih]

lithiums are ~3000mAh at low draw...

not quite sure how man mAh eneloops... probably 2000 ish

 

[batmanacw]

Guess that kind of answers the question. The eneloops are close to 2000 mah.

The only question I would have is if the lithium batteries run higher voltage, would they drive a led harder, forcing the brightness higher than normal, thereby using the battery faster? Like on my LD20. The low goes away with a new lithium battery. Means I have to be using more ma per hour.


I wonder if anyone has run side by side comparisons with the same exact led?

 

[PeaceOfMind]

The only question I would have is if the lithium batteries run higher voltage, would they drive a led harder, forcing the brightness higher than normal, thereby using the battery faster?

Depends on the light. If the voltage is too high for the light to regulate, than yes. If properly regulated at that voltage, than no. Or if the light is direct-drive, than yes.

 

[Light Sabre]

Eneloops are nominally 1.2 volts, but can be as high as 1.35 volts a day after being charged. Lithiums are 1.7 or 1.8 volts when brand new. Just FYI lithiums can kill some flashlights if they can't take the extra voltage. Have had one of mine die because of that. I think all the flashlights you listed are ok with lithiums. Do any CPFers know which ones are ok and which ones aren't?