If charging inside your house, keep an eye, unplug the charger when the light turns green, then take the battery outside. Do not leave the battery on charge if you are going out or when you are asleep
Now, I realise that this is to cover the very small possibility of rare events when something goes wrong - if all is working correctly, the battery's management system should stop charging automatically at the correct time. And, when at home, I could fairly easily live by these instructions if I don't use it every day - but I'll rarely be using this bike when at home.
If I'm touring, I'll typically arrive at a B&B or hotel around 6pm, and some days the battery will be flat by then. It's 17.5Ah, and with a 2A charger it takes 9 hours to charge. So it will have to be charging while I sleep (and go out for a meal) if I want to use it again next day. What's the solution? Not to worry about it all all, and ignore these instructions? Take along a small plugtop timer to turn it off after 9 hours? It's still going to be totally impractical to take the battery outdoors afterwards!
Any thoughts?