... Thus it is useless to me. I wanted to like the PS4 dock also possible depending on a controller can be on. Loaded Devices with batteries lose indeed like when not in use to power. So the plan was to let the controller loaded on condition of course, was that the DS has an overcharge protection, while I use the other. Since this is specially mentioned here in the instructions, you should take the loaded controller on the DS, it is useless for my needs. So again seek the good, old batteries. Otherwise it is quite small + takes the most space of course only if the pads are on. I sent them back because of the aforementioned lack of protection