Prius c start-up problem?

hi every one;
i kept my car more than 6 days in my garage and today i tried to start my car but, unfortunately smart key did not work. once i kept my hand under the door handle i can here a small click noise but it is not the usual noise and the turn light even did not flash, still the door is locked so i tired to unlock with the mechanical key. then i enter to the car and i press the break paddle i heard a long motor noise as usual but this is bit longer noise. then i saw my smart key appears on the dash board but the car did not start up . again i tried to on the car i here a knocking noise and the green light on the power button blinks . i tried several times no luck. what will be the problem will it be 12v battery ?
please be kind to reply me thanking you;
zakky

 

i am just having one fob i lost the other. no i never had this problem before because i use to start my car 2 times in a week. what will be the problem?

 

it is 2012 model i just bought it before a year in a reconditioned status. but usually i use to start without any problem from the same place i am pretty much sure there won't be any frequency problem. because once i depress the break paddle i can see this symbol on my dash but this makes delay to appear than usual. once i press the power button the engine is not starting up. so i tried to put it on mode without depressing the break paddle then the green light on the power button blinks with a small pop noise so i press the power button second time again i it did same again i pressed it third time as usual power off .

 

yup i want to check it tomorrow and i will post the reply what caused the problem

 

yeah as soon as possible i wanna duplicate one before i loos it :d