Next Alarm

Is my battery if I leave Ipods damaged the dock of the clock at night to use it as an alarm the next morning?
I leave my iPod in the alarm / clock dock me for my birthday, all night. Will it ruin the battery if I keep doing that? Or is it just the same?
and finally we all going to change the battery, but I dare not, you should just get an alarm clock
A fire alarm malfunctioned at the next apartment at 4:00am