To prevent this and prolong your battery's life, avoid letting the battery drop below 20%. If you won't use your tablet for some time, charge it to 50% capacity and shut it down before storing it.
The world is filled with rotating objects—gyroscopes, magnetic spins, and more recently, qubits in quantum computers. For ...
If your iPad is frozen to the point that you can't reboot it the normal way, perform a forced restart. Charge the battery.