A friction-enhancing lacquer contains a binder and hard material particles. The sash window assembly has a sash window slidable within a master frame. The first electron source is energized in the cold operating mode, and the second electron source is energized in the hot operating mode. The cathode is then formed on the electrolyte by depositing a second thin film using known film deposition techniques. The battery charger structure is configured to be combined with a flashlight charger assembly and to form a common back plate therewith for securing mounting the combined assembly. One application of the present invention is to identify a source of a denial of service attack.