Conversation

interesting, my new mac does something called "charging on hold" to avoid fully charging when you rarely use unplugged... stops at like 70-80% but you can force it to charge to full. Why is 70-80% an efficient hold level?
9
24
I get that it’s about battery longevity etc. I’m asking where the specific 70-80% number comes from. A fundamental property of lithium? Random threshold on the knee of a discharge curve?
Replying to
There's a voltage-soc curve for every battery. Higher state of charge, higher voltage. At max voltage a chemical rxn is more likely to occur that causes the degradation. If your battery could live in the mushy middle, it would last way longer.
1
1