my ipad is drained so i charged it it will turn on but then quickly turn off again it keeps doing that what should i do?

Try to reset your device. This won't delete your data stored on the phone.

• Press and hold the Sleep/Wake button
• Press and hold on the Home button
• Keep holding both buttons until the display turns off and back on with Apple logo on it.

Alternatively, you may go to Settings - General - Reset - Reset All Settings

If this does not help, try these steps. Note that this may erase the data from your computer.

You need to restore your device to factory settings.

Take a look this Apple Support article: Use iTunes to restore your iPhone, iPad, or iPod to factory settings - Apple Support.

As a final step, try the recovery mode. Turn your device off, then plug it to your computer with the home button pressed. You will need to have iTunes installed on this computer. Keep the Home button pressed until you see the iTunes logo on the screen of your iPhone. After that on your computer you should see the iTunes window saying your iPhone needs to be restored to factory settings. Click on the restore button.

Try connecting it to your computer with iTunes installed. Once you connect it, iTunes should detect an iPad.

Go to the Apple Store and have them test your battery.