Hi CessnaPilot80,
You can find the online battery manual by clicking Support / Battery Manual. Here is a shortcut: http://ifly.adventurepilot.com/portal...
This will explain the lights. Charging time will vary. Your first charge might take a few hours. Subsequent charges will be faster. And of course it depends on how discharged the battery is to start with. You should charge until you have 4 solid green lights when pushing the button. The battery will not overcharge, so it's okay to leave it pluged into the AC adapter if that's easier.
-Walter