Connecting a Zapper to a AC/DC-adapter

Hey,

Recently I got tired of constantly having to change batteries to my Zapper.

Do you think it is possible to use an AC/DC transformer, which transforms the voltage from 220V to 9V, and also changes the current to DC? That is what I did, but I am not sure if the Zapper works as well. The AC/DC adapter probably does not change the current to a smooth DC-flow, but rather a "pulsed" DC-flow.

Is there any expert on Zapper-electronics that would know this kind of stuff?

/Korre Tweet