PS3 controller death

PLEASE PLEASE HELP - I began playing FIFA 10 last night on my PS3, updated the systme and began practise mode for 5 minutes. Suddenly, my controller seemed to die. All lights etc went out. It is a Sony Dualshock 3 SIXAXIS controller. I tried connecting to PS3 and resetting with button on the back of the controller but there still is no life in my contrller. Can anyone help or shed some light on what i should do please?