Lokmat APPLLP Max (aka Prime 2)

Guys want to know how to charge the smartwatch
I mean at what % u must charge?
And one more thing for example I turned off my smartwatch at 70% after phew days can I charge it from 70% to 100% when I go for a long journey? or better wait till it goes down to 20%???

P.S. Thnx for your response. I just want to make the smartwatch’s battery life much longer.