I don't use them in flashlights, because I don't want the extra drop in efficiency from two DC DC converters. Ideally I use lithium ion cells directly in all my flashlights.
These cells are great for very low drain applications, especially things that aren't designed to work well with nimh...
It's hard to compare mah because the voltage is different. mwhr is a measure of energy, it's volts times mah. Harder to compute with the newer batteries that have voltages that adjust down continuously.
Some new contenders for the largest capacity:
https://www.xtar.cc/product/xtar-1-5v-aa-clr-4300mwh-2700mah-lithium-battery.html
https://www.xtar.cc/product/xtar-aa-lithium-lr-3000mah-usb-c-battery
I have only used the 4150 mwhr version...
https://www.xtar.cc/product/xtar-aa-lithium-4150mwh-battery-with-low-voltage-indicator/
-20C to 60c
Usually discharge at extremely low temp is fine. You just can't charge below freezing.
What cells do you have that are exposed to -40F?
Are there any lithium ion batteries better than the XTar 4150 mwhr ones? I'm going to get more for my smart locks. They don't seem to work well with nimh batteries. The low battery alarm comes on way too early.
Yeah, I think the cycle life on the N40 is pretty low, maybe a few hundred cycles. But, I don't think I care much for something that is used about once a week.
Random question from someone that hasn't been paying attention for a while. Why would I pick the HM61R V2 over the HM65-T V2? For a running / working light.
Also, anyone running the Vapcell N40 in these lights? Seems like we'd get a nice boost in runtime.
Yeah, I'm thinking about the Xtar batteries specifically for very low drain applications, like garage door monitors and smart locks. Specifically, poorly designed ones that don't work well with NiMh batteries. Ones that cut out at 1.25 v per cell, leaving a lot of capacity in the battery. Well...
I've been looking at 1.5V 14500 AA lithium-ion batteries for a while but haven't found any with good reviews. I need a few for low discharge applications that don't work well with NiMh batteries, i.e. they cut off at 1.25V because of poor circuit design. I hate to keep using alkaline batteries...
Ok, I'm curious. I thought I was a flashlight nerd, but I may not be deep in enough. Maybe I'm just more interested in ultralight headlamps for running.
I have a Fenix E35 v3 and I can't really imagine what would be that much better about the sc65c or other zebralights. I can guess the CRI...