I was talking on my LG Madison which has no low battery warning and when it shut off, it sent an extremely high pitched sound which seriously deafened me for 30 minutes, pain in my shoulder and my heart, it was unbelievable, it has happened twice now. I cannot find any other people who have had this problem. It is crazy, I couldn't hear from that ear for 1/2 hour. Outrageous, I should sue them