SONY AC-PW20

While the adapter works, there are two problems with it: it costs too much, and emits a loud (at least in studio environment) buzzing electronic noise. For a dumb adapter costing this much, you would think they put together something without such a...

you need something called a DC coupler which is a "false battery" (it makes your camera think its' a batter whereas it just gets powersupply from external source). The one in the image is a Sony branded one...but it can be had much cheaper online (off...

Freedom from batteries at the cost of restricted movement.