Years of reading and battery safety is a mystery to me

[SYZYGY]

Personally I find it much easier to store a battery at 100% SOC. Put on the charger, put it away. I really should buy a charger with a settable end point.

i have MC3000 and like it. i store cells at room temp 50% SoC.

 

[JustAnOldFashionedLEDGuy]

i have MC3000 and like it. i store cells at room temp 50% SoC.

I have big "12"V LiFeP04 batteries for my trolling motors. I made a custom configuration for my electronic loads that will automatically discharge them to 70% for storage. They are a few more dollars than an 18650. Treat them well and I should get 15 years out of them. Will end up costing 1/2 the amount of the old lead acid and my back is thankful too.

 

[JustAnOldFashionedLEDGuy]

i have MC3000 and like it. i store cells at room temp 50% SoC.

I think I would still store in the fridge but keep at 80-85%. That's close enough to 100 for almost all use cases.

 

[KITROBASKIN]

Most of my backup batteries are about 80%, but closer to 100% inside about 5 flashlights. I have some almost 10 year old 18650’s that are doing fine.

 

[KITROBASKIN]

Hey LEDguy, check out this video. He is a big dog at CurrentConnected where I bought my LFP batteries. He is active on diysolarforum. After 5 minutes there is not much more to be seen on this: