Unregistered

my phone has been doing the exact same thing. It will last on 3 battery bars for 3 days then when I try to charge it, the battery starts flashing and a black box appears saying 'Low battery recharge soon' but when I put it on the charger it does the exact same thing. I have to hold it in myself but it takes about 3 hours for just one battery bar to come back. I am not holding the charger for that long. I am going to get a new chargerm, but if that does not work I am definatley getting a new phone. I'm sick of it. If this second phone does not work I will be demanding another phone from them or I'm switched companies.