Battery charging is a complex electrochemical process, in which the discharged electric energy must be replenished from the electric network. The quality of the charging process is critical to the health and longevity of batteries. As a result, battery chargers play a key role in the life and performance of today’s industrial batteries. This white paper, written by ACT’s Dr. Nasser Kutkut, discusses the differences between ferroresonant, SCR, high frequency, and Quantum chargers.