A compact, high-speed charger designed for Lithium-ion and Ni-MH sliding batteries ranging from 9.6 to 18 V. The DC18RC features an integrated cooling fan for optimal charging performance. It continuously monitors the charging voltage, current, and temperature during the charging process. The built-in cooling system directs cooling air into the battery, preventing excessive heat build-up, which not only prolongs battery lifespan but also accelerates the charging speed.