I’m a Hanklight fan, but interested in longest lasting emitter / battery combination (camping, etc). 26800 (largest Hanklight battery) battery option is available in D4SV2 (4 emitters) and DM11 (1 emitter). While the DM11 has only one emitter, it is physically significantly larger than the D4SV2 (4 emitters). Does anyone have any experience or advice on the longest lasting combination?
Anything with a regulated driver (boost or buck) will give good output with a good quality battery. Even still, a single xhp70.3 6500k R70 will be more efficient than 4x519a run off the same driver. However, running on higher modes will drain the battery quickly of you set a higher than default thermal ceiling.
With the new 21700 releases that go over 6000mAh I would rather go for the DA1K (great LumeX1 driver) with an XHP70.3 70CRI and one of those massive 21700 (Vapcell F63, 12,5A CDR, 6300mAh, should do well for everything apart from sustained turbo). Sure, they are a bit smaller capacity than 26800 but the better driver and being able to carry spares more easily (a 26800 is about 115g while a 21700 is about 70g, so You get much more mAh/g with the 21700s)
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AFAIK you’re only getting that capacity with very low discharge currents. For normal flashlight use it’s more like a 5000mAh cell so I’d rather get a Molicel P50B in the first place.
Typical Capacity 6250mAh (0.2C discharge)
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That’s 1.25A and at least 3.75W. With DA1K XHP70.3 R70 that will be roughly 500 lumens, quite enough. Even if we go up to max sustained 1000 lumens (my assumption, based on XHP50.3’s test results) that will need around 3 amps. So, such drain rate won’t cause drastical capacity decline.
Also with a fresh battery those currents will be 25% lower.
EDIT: For example I tested LG M52VT with 2.5A discharge current and got 5150 mAh at 2.5V cutoff.
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I dont think 26800 ever became mainstream for flashlights. I love the form factor but unfortunately only a handheld of lights made that take this battery.
I have two p50b and I don’t really like them, they discharge faster than my 5000mah generic liitokala 50E even when using a light with the Lume X1 driver.