“Why do they not give the time for 100% charge? “
Uh, they do ...
Oksay, then why wasn’t that the headline?
People who don’t own or use an EV or lots of portable devices lack the knowledge to know that lithium chemistry is really 20% to 80% state of charge SOC.
This is properly called it’s operating window. Outside this window and SOH state of health degrades at a much faster rate.
LFP cells do 0-100% windows but that cuts the cycle life down to 3000 or so doing 100-50 which is 50% DOD cycles the cycle life jumps to 20,000 at 1C drop that to 1/4C discharge and charge rates and it’s 30,000 a ten times increase.
https://www.powertechsystems.eu/new-high-performance-lithium-lifepo4-cells/
This is why having 98-99% after an abusive 11C uncooled charger is impressive.
Donut showed SOH curves for regular 1 & 5C rates they go asymptotic after the first few hundred cycles. They extrapolated it out to 100,000 cycles until 80% SOH
No surprise there is little to break or degrade in a solid anode, solid nanoglass, solid cathode system only the ions need to move and if you have strong ion cages they can law a looooooonnnnggggg time.
For comparison sodium ion cells have hit 50,000 cycles due to Prussian Blue cathode’s cages being smaller than the sodium ion entering them there is virtually zero atom stresses.