(29 Oct 2017, 12:16 pm)Jimmi wrote I would still rather have plugs but they have proven to be too unreliable at Arriva at least.

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I think something was mentioned a while back about the reliability of the plug sockets, and the reasons that USB chargers were more reliable. IIRC, the plug sockets would all break if just one fused, whereas with the USB sockets, they're all independent.