Cell phone stun guns are very powerful stun guns that are disguised as cell phones.  Your attacker will not even know you have a stun gun until you press the button and either scare them off with the sound of it or take them down so you can get away.

All the Stun Guns have a limited life time warranty against defects.  It does not cover damage from misuse or abuse, moisture, loss of parts, tampering with(opening the unit), or recharging the unit not according to the instructions. (which comes with each stun device)