Ultrabook tunroff when charger unplugged

Hi,

Recently i have upgraded my ultrabook to windows10. My device worked well for few days, now i am able to turn on my device only when charger is plugged in and when i remove charger it will trunoff. After charger is plugged in my laptop is detecting charger and icon shows that battery is charging. what would be cause for the problem and it would be great help if some give steps to get rid of this problem