Orion DC Dew Zapper With Dew Zapper, you'll never have to stop observing to remove condensation from the corrector plate of your SCT. The flexible fibreglass reinforced heating element straps securely in place with a velcro fastener. Runs on 12v DC power, plugs into car cigarette lighter socket or field battery delivering upto 20 watts, 2 amps. All models include a 3 metre cable.