As was stated by another person previously, it may not be a good idea to carry an expandable baton if you are not trained, as it could be taken away and used against you. For a peace of mind keep your cell phone handy to call the police when walking alone or talk to someone on it during your walk. Some other alternatives to the expandable baton include a kubaton or keychain baton. As another last resort dog repellant could fend off a would be attacker, however may malfunction or the wind could send it back in your direction. Be safety concious, be aware of your surroundings and trust your instincts.