I am fairly new to this hobby. Today a flew my P2V+ which I purchased used. After approximately 5 minutes or so I got the low battery signal and the P2V+ came home and landed. This evening I decided to put the P2V+ on "Assistant" and check the battery, only one LED lit and it was blinking. Assistant said Design Capacity: 5200, Full Charge Capacity: 4400, Current Capacity: 3820 and Percentage of Charge 7%. After fooling with Assistant for a while I turned the battery off and back on. Now 3 LEDs lit steady and Assistant read Percentage of Charge: 69%. Anyone have an idea?