Batteries are important form of technology for society. Batteries serve as a stored energy source. You can quickly think of multiple instances in where you are dependent on a battery (some examples are: car (electric started), calculator, iPod, hand held video game, smoke detector, or key fob). For engineers at the Air Force Research Labs b they must design batteries that will provide the most energy (criteria) but weigh the least amount (constraint). This lesson is modeled after the same engineering design process the AFRL engineers must follow; students will be problem solving, designing, and constructing a wet cell battery. Students will construct a working battery after testing various metals and solutions to determine the combination that will create the highest voltage.