What is the best way to charge a Lithium Ion Battery?

There are a lot of conflicting opinions about the best way to charge a Lithium Ion Battery, and I want to know which is the best way to charge my battery on my phone etc.Feel free to include anecdotes e.g. • How you charge your battery • How long you charge your battery • How long your device after a charge via /r/tech https://ift.tt/2NYuzUh