A ground care apparatus such as a robot lawnmower and a charging station apparatus.The charging station mounts a pair of substantially upright opposed guide surfaces, inner ends of which are separated by a contact socket apparatus including a contact socket and outer ends being further apart than the inner ends.,The lawn mower mounts a contact pin which extends generally horizontally from said apparatus, and the lawn mower and charging station are adapted so that they move or are moved to engage with one another and engage said contact pin in said contact socket, and if the two apparatuses are misaligned horizontally, said contact pin engages a relevant guide surface so that the contact pin and contact socket are relatively guided into engagement
