Lithium batteries do not like to be drained all the way down or be fully charged for longevity. General rule is to keep them between 80-20% if you want the battery to last as long as possible. Realistically though you give up runtime so I charge them to 100% and recharge whenever possible because I would rather have the runtime when needed vs the battery lasting for longer. Running them all the way down is harder on them than fully charging them.JuPaul wrote: ↑Fri May 15, 2020 6:28 pmYep, I can see that being annoying. I've always heard that it extends the life of a battery if you drain it completely before recharging - is that true of these newer rechargeable lithium ion batteries? I ask because recharging the light every night would certainly get me through any average day.PeaceInOurTime wrote: ↑Fri May 15, 2020 5:52 pmThere are pros and cons to USB rechargable lights.
I'm using a USB rechargable AAA cell in mine. I always carry an extra cell that I can swap out if the rechargable cell runs out when I'm in the middle of using it. With the USB lights, you don't have the option to swap out a battery when depleted and continue to use it, you have to dock the light and wait.
The number of times the battery is cycled also has effect on longevity so avoid topping off daily if you don't need to and are concerned with the battery lasting for as long as possible.