question about charging

[dsraoof]

i just bought the pilot acs.. good gun. anyways, i didnt recieve instruction manual so i was wondering 2 things.

1. how do i know if the battery is charging?? do i just plug it in and it's charging, or is there anything else i need to do?

2. what are those numbers for (6-13), what do they do and which one should i have it set to?

thanks.