I have eneloop AAs and eneloop D to A adapters, put it in the car yesterday. Its about 40F and seems to be as bright when cold close up (down the basement stairs) as D cell Energizer Alkalines at room temp 70F.
I have some no-name adapters that hold 3 AA in parallel for more capacity.
Don't know about when it gets below freezing, which is where people recommend primary lithium - except I read the other day that the fresh voltage of up to 1.8v might fry the LED. Or also I guess an incan bulb.
Can anyone verify that a 3D Mag LED can handle that?
I have 3 cell lights, so that would be 5.4V instead of 4.5v
RE PRIMARY LITHIUM
Primary Lithium Cells
www.batteryspace.com
1. Since primary cells/batteries are non-rechargeable, do NOT connect them in parallel, unless there are diodes to prevent cells/batteries recharge from each other, from higher voltage to lower voltage ones.
2. Don't connect primary cells/batteries more than 2 in series. Especially when cells/batteries are not in balanced status, this might lead forced over discharge which will generate heat and might cause explosion.
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So that means no increasing the capacity, and no 3D lights at all.
For a car flashlight, I like the 3D mag for being long enough & heavy enough for defense (at least when loaded with D cells). And the twist focus between flood & spot.
Tenergy makes Nimh D cells in 8000 and 10,000 mAH, I need to look for the best price from a reliable source:
Premium D Battery - High Quality & Capacity Battery. Up to 1000 Cycles. Replace Alkaline Batteries in: Baby Equipment, Toys, Radios, Flashlights, More. Easily save money over Alkaline disposables.
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Centura D Battery - High Quality & Capacity Battery. Low Self Discharge Technology. Up to 1000 Cycles. Replace Alkaline Batteries in: Toys, Radios, Flashlights, More. Easily save money over Alkaline disposables.
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But I still kind of wonder about lumens at 1.2 instead of 1.5. It might also be affected by how the light is regulated.