I wish to understand how a battery charger may best be designed in order to maximise the life of Lithium Ion batteries. I have specified Lithium Ion batteries as they are what is used in most laptops and in many other pieces of modern equipment.
There is much advice and opinion available but as some is contradictory it is clear that any one opinion or offered advice may be partially or largely incorrect.
I wish to understand which parameters are genuinely important, how varying them will affect battery lifetime and which of the "commonly given" advice is actually incorrect.
In orer to make the question more specific initially and to provide a finite target for answers people could consider addressing the following charging scenarios. These may not be the only options.
- Force charging-Charging even after reaching 100% of Lithium Ion battery capacity.
- Charging only after the battery is empty.
- Charging the battery in parallel while the powered equipment is working.
How do these affect battery life?