The widespread use of radio by the general public began in the early 1920s. In 1921 there were only around five radio stations broadcasting on a regular basis. In just two years there were hundreds of ...

What does more “juice” mean for agencies? IPT Lithium Polymer Lifesaver Series batteries cover shift after shift without fail. Now, Impact Power Technologies has engineered a new battery that delivers ...

If you have even a hint of curiosity in your soul, you cannot help but wonder why there are AA, C and D batteries, but no "B". Well, it turns out that there were B Batteries, which were used for ...

New York: Matt Reynolds, an assistant professor in the electrical and computer engineering department at Duke University, wears other hats, too -- including that of co-founder of two companies. These ...

I’m sure many readers have built “crystal radios” that were able to provide audio from local AM radio stations to sensitive earphones using only the RF power from the radio station–no batteries are ...