Ryobi's 18V Hybrid Propane Heater promises power and portability, but users say you'll need more than a battery to make the ...

Imagine that your major home appliances run on batteries. Using regular cords that plug into standard 120-volt outlets, the appliances charge themselves when power is cheapest and store enough energy ...

Here is a simple heater circuit that can be operated from a 12V battery. The first part of the circuit is an astable multivibrator build around the two transistors Q1 and Q2 . The ON time of ...

Anthony DeVito, 37, grew up in central Michigan, farther north than both Chicago and Detroit. After attending college in the state, he spent another 10 years working in construction and engineering, ...