Why won't my phone turn on and stay on?

[AC Question]

My battery life drains so fast on my Samsung Galaxy Alpha, it only takes about an hour and then when it gets down to about 20% it shuts off. Now my phone will only work for a period of time if I have it charging, but when I take the phone off the charger it will just shut off right away.

 

[srkmagnus]

My hunch is that the battery needs to be replaced. Give that a shot and let us know how it goes.