Doesn.t say much for your main agent in fact I would ask for all my money back.

A battery should last around five years reasons for failure are a constant drain on the electrical system,check with a multimeter with the igniton switched off.

Overcharging again easily checked with a multimeter should be between 13 and 14 volts.

Check the voltage with the engine on and all electrioal devices switched on it still should be above 12.5 volts.

Batteries do not pack in without reason if I remember correctly there is a known problem with the alarm system on this model causing an alarm drain

Thanks to both - the trouble is that agent has done those checks and still can't find anything. I am really wondering if anyone has come across this before and knows of some odd and iunexpected solution.

Thanks - I will try that .....!