There seems to be no exact science with Li-ion battery life. Even defining "life" is difficult, since some people say the batteries "life" ends at 80-50%.
Of all the things I've heard about Li-ion batteries, the only ones that haven't been refuted are:
- Li-ion batteries like living at around 70%. More or less will decrease their life
- Li-ion batteries will always lose 30-50% capacity in 3 years even if they're just lying on a shelf due to their chemistry
- Li-ion batteries dislike heat. More heat reduced battery life. Coldness will temporarily reduce capacity, but has no long-term effect on lifespan.
Of all the things I've heard about Li-ion batteries, the only ones that haven't been refuted are:
- Li-ion batteries like living at around 70%. More or less will decrease their life
- Li-ion batteries will always lose 30-50% capacity in 3 years even if they're just lying on a shelf due to their chemistry
- Li-ion batteries dislike heat. More heat reduced battery life. Coldness will temporarily reduce capacity, but has no long-term effect on lifespan.