The technology of an OPTIMA battery provides a solution for police and emergency vehicle fleets that depend on the power and reliability of their vehicles to do their jobs. OPTIMA batteries were created specifically to withstand the increasing electrical demands and intense operating conditions that emergency response vehicles face on a daily basis. OPTIMA's YellowTop dual-purpose batteries provide a higher level of electrical output as well as a stable voltage supply for the increasing list of electronics becoming standard in emergency vehicles. These dual-purpose batteries supply reliable starting power to the engine while ensuring a consistent supply of power to the vehicle's advanced electrical systems when total amp draw demand exceeds alternator output.