I certainly have not Alex. I don't do AP so just use it for the mount and eyepiece dew heater turned up just as high as it needs to be. I have a heated dew shield for the Nexstar but have never needed to plug it in. The weight, quick recharge time and convenience made it appeal to me. Also keeps the iPad charged. Three 12v and 3 USB outputs. But yes, pulling 10 amps at 12 volts from a 155 Wh supply will not last long!
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