Why do Range Rover batteries run flat so often?

The AA and other forms of assistance are kept extraordinarily busy at Royal Ascot re-charging the flat batteries of innumerable Range Rovers: this is an annual performance that I have been witnessing for years. One would imagine that the various owners of Land Rover manufacturing might have addressed the issue over the years?

Asked on 12 June 2011 by NSG, Hundon

Answered by Honest John
It must be because they use the power sockets to run wine coolers, etc.
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