I noticed that my battery on my Phantom 2 Vision only lasts about 3-4 minutes of flight time, and it doesn't take too long to charge. This comes after I left my battery plugged into the charger for about a week, fully charged (after charging). Did I unknowingly ruin my battery and do I need to buy a new one? Is my charger broken? I have attached some screenshots of battery readings from the Phantom software. Thanks for the help.