Sets the current limit on the Grizzly. The units are in amps. The
        internal default value is 5 amps.

def limit_current(self, curr):
        """Sets the current limit on the Grizzly. The units are in amps. The
        internal default value is 5 amps."""
        if curr <= 0:
            raise ValueError("Current limit must be a positive number. You provided: %s" % str(curr))
        current = int(curr * (1024.0 / 5.0) * (66.0 / 1000.0))
        self._set_as_int(Addr.CurrentLimit, current, 2)