Enables the transmembrane transfer of a potassium ion by a voltage-gated channel. A voltage-gated channel is a channel whose open state is dependent on the voltage across the membrane in which it is embedded.
Reactome:R-HSA-9659554 "KCNQ4 transports K+ from the cytosol to the extracellular region"
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Reactome:R-HSA-9667761 "KCNMA1:KCNMB1:LRRC52 transports K+ from the cytosol to the extracellular region"
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reactome:R-HSA-1296127 "Activation of voltage gated Potassium channels"