How many times has this happened to you: You've been at the transmitter site all day, and your cellphone battery has run down because cell coverage at transmitter sites is often horrible. You left the charger somewhere else because you didn't plan on being at the transmitter all day. There is an elegant solution to lugging around an extra charger: roll your own.
Irwin is transmission systems supervisor for Clear Channel NYC and chief engineer of WKTU, New York. Contact him at email@example.com.