The ICS1712 is a CMOS device designed for the intelligent charge control of either nickel-cadmium (NiCd) or nickel-metal-hydride (NiMH) batteries. The controller uses a pulsed-current charging technique together with voltage slope and/or temperature slope termination. The ICS1712 employs a four stage charge sequence that provides a complete recharge without overcharging. The controller has four user-selectable charge rates available for customized charging systems.