I have been using my iPad Pro as a wacom tablet and I have it plugged in ac power 24/7. Will this damage the battery long term or is it like a laptop that charges until its full then stops charging. I like keeping it plugged in all the time but I am wary that it will destroy battery life by doing so. The other thing I wanted to ask was I noticed they had some cheaper lightening cables (amazon basics) that say they are apple certified on amazon. These should work ok then if they are certified by apple?