I tend to use the rough formula bandied around on here of:rool said:3S 18650 Cells should be enough.
I'd also like to know how to calculate runtime when using a source with higher output voltage than required.
If you put the following data into the input fields of LED Pro:tamen00 said:
This confuses me. Years ago when I was into backpacking, I was constantly reading how you had to have lithium batteries because they were the only ones that work at winter temperatures. Maybe our rechargeable Li Ion batteries perform differently in the cold than disposable lithium batteries?OldMTBfreak said:The batteries (our fav Li-ion) work poorly under 40F, much cooler and performance is down by 30-40% or better. Much below freezing and they are maybe at 10-15% of room temperature performance.