"You can plug in the electronic device down there"
So "là-bas" doesn't also mean below? I thought it was the opposite of haut...
"Below" is more akin to "en bas".
"Là-bas" is over there, down there, up there, in there, out there, right up there, pretty much anywhere you can point at.
Electrical appliance is a synonym of electrical device
In general, an appliance is considerably larger than a device. But in any case, this sentence is about electronic devices (typically even smaller), not electrical devices.
What is wrong with "You can plug in electronic devices over there."?
The French sentence specifies a specific device.