Upon return from a flight I noticed my P3A had a strange buzzing sound, not thinking anything of it I just powered it off and waited for the next flight. Well shes still doing it, Ive removed the gimbal and wires, that was not the source of the sound. It seems like its coming from the VPS or inside the battery, almost like a fan or high pitched constant humming sound. Im not seeing any difference in performance, I just let her sit under GPS @ 20ft altitude and hover for the entire battery. The battery reached 37C and its about 50farenhiet tonight.