How to make my iPhone Work again

My iPhone won't turn on unless i plug it into a wall charger. It says it has 100% but as soon as i take out the plug, BOOM, it turns off and i try turning it back on but non of the buttons work unless i plug it back in.

Take the battery out. Or hold the off button until something happeneds.

Shove it up your ***.

Go to a local phone store. Or look it up on google, you would probably get better answers