Battery of RX-7

In this winter vacation I prepared the Computer Based Testing (CBT) that was perforrmed at 6th Jan. then I could not drive my car. Almost one month I left my RX-7 as it was. A few days ago when I switched on the ignition of the car, there was no response! The battery went almost flat. I just changed a new battery last year. So this dead battery is now recharging at Mazda garage near my home. I hope a revival of the battery. Anyway cold and snowy environment is not good for a battery.