NiteSafe Maxi Rechargeable Night Light - 4 Function LED Nightlight, Power Failure Light, Torch and Work Light - Triple Value Bundle

Can these be kept plugged in to a socket at all times. Or would this cause over charging and a fire risk?

Does it work in EU?

Can these be set to only come on when there's a power fail ? i don't want any night light features, just them to come on if the power fails.

Do these come on with movement at night in the dark?