Several Butler County fire departments have started locking in half-price emergency responder radios, in case a $2 million federal grant doesn’t materialize. Liberty Twp. signed an agreement last week that sets the price but becomes moot if the grant comes through. All the jurisdictions that have made deals with Motorola must purchase the radios from the communications equipment giant if the federal grant doesn’t come through, but if it does, the departments will have to put the radios out for bid.The other jurisdictions involved in the grant application are: the cities of Hamilton, Middletown, Monroe, Oxford and Trenton and the townships of Hanover, Madison, Milford, Morgan, Oxford, Reily, Ross, St. Clair and Wayne. If successful in receiving the grant, the departments would only have to pay 10 percent of the radios’ cost.