I cannot answer this problem because I am having the same but someone replacing battery due to it reaching a low voltage threshold, I do not see how that be, if device (mine) was always plugged when bars was 1 left. After 2 days, I unplugg and it says battery low and system turns off ...I keep charge cord plug and all is fine ... any other thought up suggestions but make sure, this answer is NOT a guess, and you have good knowledge instead of answering to be smart, I need a sincere solution