Good Gear Guide
In Pictures: Swiss Army smartphone - 7 tools your ...
To protect yourself at closer-than-pepper-spraying distance, consider a Yellow Jacket stun gun case.
According to Yellow Jacket's web site, the shock delivered is more of a "sting" than a "stun."
And the case also provides up to a full battery recharge for your smartphone.
In Pictures: Swiss Army smartphone - 7 tools your phone can replace