Motorolai836

i went to charge my phone and it said invalid battery??? It is a year old and has had the same battery all this time. So I unhooked the charger and blew into the connections, thought maybe they were dusty. Then I plugged it in and it reads incompatible charger. I tried a different charger and same thing. Also tried a new battery. NOTHING. HELP! This phone is only a year old and is carried in my puse so it really has never been dropped. I only use about 50 mins a month. Should this really be quitting on me already????