Chargers can be programmed to terminate charging via -dV, dT/dt, and 0dV detection methods. Each phase of charging (initialization, fast, and top-off) has a programmable, safety back up timer. Input is 90-264VAC/47-63Hz with charge rates between 0.9A and 3.0A depending upon exact model. Safety approvals include UL (pending) and CE. Contains integral LED status indicator.