Few questions regarding the P2 batteries. 1. I have read that if we are to store the batteries for more than a week, best practice is to keep it 50% charged (2-led bars on the battery). Is the best way to do this, just to fly the Phantom? 2. What about a maintenance schedule regarding how often to fully discharge and fully charge the battery? 3. Is there a percentage or voltage level the battery should not go below on a regular basis? 4. Does the first low battery warning (red led flash) occur at 10.65V? I read that the 2nd Level Low Battery Warning is set to 15% 10.65V and the 2nd Level Low Battery Warning will trigger auto-landing? What voltage is a fully charged battery? Thanks!