Spelling error, should be cannon, as in huge gun. (corrected now).
I don’t carry anything like that for scuba, and divers use big lights for scuba. Some do, of course, but they are quite expensive.
My car lights aren’t that powerful.
Got it, thanks
I do not read Spanish, but it looks like there is a 20 volt DC selection. That is what you would use to measure the voltage of your battery. At that price, get two to see if they are accurate. “You tube” has videos showing you how to use a DMM, because the instructions for cheap stuff are often wrong or misleading.
Someone asked Elon Musk on Twitter what he recommends, his response was 30 - 80% will almost double the battery’s life cycles before needing replacement.
Always charging to 100% is wearing your battery at a faster rate. My Samsung S21 has a feature that stops it charging at 85%.
When it comes to most flashlights, max brightness can only be achieved by charging to 100%, so you need to decide how important battery life is or whether max output is…
There is an optimal way to store batteries but AFAIK, that entails keeping the cell at about a 50% charge. Doing this would defeat your goal of having an emergency light. Add the parasitic drain factor and the battery may be completely dead by the time you actually need it.
Best advice, keep it fully charged and replace as needed. Also, keep a backup light as well if you really want to be prepared.
Well, it is good to know it! anyway I will have backup lights and most of my batteries I could let them between 50 and 80%…. good idea, cheers
Look, if you’re going camping in the middle of nowhere and your life may depend on a few minutes more light, charge everything to 100%.
If you have frequent power outages, invest in a few big-ass powerbanks so that you can charge lights, phones, etc., when needed. And worst case, portable solar panels can trickle-charge those powerbanks when not actively needed.
But especially knowing Li cells are hard to get, treat them nicely. There’s nothing wrong with letting a light run down to 3.3V or so. My GTmicro is at about 3.5V now, and I figure I’ll wait a little bit more before topping off. Most of my other lights are around 4.0V or so, unless I use the built-in charger and let it top off on its own. But I do generaly “run them down” a bit to minimise the number of cycles.
If a storm’s coming and there’s a possibility of a power glitch (almost never happens here in NYC unless it’s a local event like a tree keeling over and knocking out powerlines), then sure, I’ll top ’em all off Just In Case.
Just don’t worry or be obsessed with that “100%” day to day.
I agree.
I keep my lithium cells around 3.7V for storage. But I keep my lead acid (for my solar system) fully charged. So in a power cut if I need to charge them, I can easily do so without worrying about wearing them all out prematurely.
The cells that I use daily get fully charged, but I don’t care about longevity on those as I can just buy new ones when I feel the capacity has decreased too much for my liking, or I put them in lower drain lights instead. Even when pushed really hard on a regular basis I still get at least 2 years from a cell.