How do you charge K2 for longer battery lifespan?

I mean not the hours while you can ride after the battery charged, but the years while you can recharge your battery again and again - with the less possible loss in its performance.

Online HH documentation has no advice on this topic, but "If you have stored your Karoo 2 for a long time while charged, it's best to fully discharge and recharge your Karoo 2 to reset the battery logic."

It was even the everyday practice to notebook and phone batteries too years ago, but for modern batteries manufacturers not only recommend, but also provide software solutions to keep charging under about 80 or 85%.

HH documentation says also "Do not store your Karoo 2 for long periods of time fully charged or discharged. Lithium polymer batteries last longer when stored at 50-70% charge."

At what percentage of charge do you recharge the battery? Near 0 or right under 50%?

What percentage do you charge to? 100 or 70 or 80-85?

Awaiting opinions!

THX