solar battery top up panel

I have one and after a hell of a lot of searching I finally found the OBD plug in my 2001 F.



I thought the whole point of these things was that they were easy to access. A sill bit of design on Rover Group's part.



Anyway, I digress. Do these things actually work? I have a very healthy battery, new when I bought the car last year. The car's not been getting much use of late so I hooked this thing up.

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