3 ms·
With experience one can have an idea of what charge is left on a cell. One easy way to gain experience is with a decent Li-ion flashlight. It doesn't take a who
by Maursault 5y ago
With experience one can have an idea of what charge is left on a cell. One easy way to gain experience is with a decent Li-ion flashlight. It doesn't take a whole lot of tools to test resting voltage of a cell, a cheap multimeter will do. Modern chargers should be smart, have some function to automatically test for resistance, and refuse to charge a cell with resistance that is too high or if voltage under load is below 2.5V.
Frankly, I am a bit astounded these devices were developed. I'd recommend against wearing Li-ion cells on your head unless you really know the cells, know their age and history.
- romwell 5y agoAgain, as a tinkerer, I'm happily learning from your comments — thank you! But the general public can't be expected to know all that without it being even in the booklet that comes with the product. >Frankly, I am a bit astounded these devices were developed. Well look at the comments here that say "risk of death is a part of life, deal with it". That kind of attitude is why.