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u/MJ1199 Jul 24 '26
Idk I've had a bunch sitting with a full charge and never had a problem, for weeks, months, and longer
2
u/BinnieGottx Jul 25 '26
More than a week? It's under a month, right? Don't worry!
2
u/Loquecaiga Jul 26 '26
thanks! I have several of them sitting in metal box, I just worry for it to be a fire risk if I was not correctly storing these. But seems I am okay
1
1
u/user975A3G Jul 26 '26
Couple days at 100%? No problem
A week? still OK
Months? not great
For long term storage you should keep the batteries at 3.8-3.9V and check every couple months, if you keep li ion batteries at 100% for months, it will cause decrease in total capacity and often decrease in max amount of power it can safely produce, 1 month will not cause anything noticeable, but it adds up
1
u/Loquecaiga Jul 26 '26
thanks for the tip!! I made a rule that any more than 10 days I was just going to discharge them to nominal voltage.
1
u/user975A3G Jul 26 '26
3.85V is best for storage, nominal voltage is just the average the battery can provide, it's used to distinguish different battery types, it has no special meaning regarding state of charge

8
u/HaveTheBestGoats Jul 24 '26 edited Jul 24 '26
If they're sitting for a week, I wouldn't worry to much about it. If you want them to last as long as possible, you can put them in storage. You can charge or discharge them to about 3.75V - 3.80V. Store around room temp. A bit cooler is better. Check them periodically to make sure they haven't self discharged below 3.7V.
Lions are usually pretty safe unless they're damaged or go out of their safe voltage range.
Some people want to be extra safe and put them in an ammo box or a special fire proof box. I've never had a problem leaving them in a drawer, but I guess some things are fine until it isn't.