Our not-quite four year old V70 (40,000 km), automatic, has just had a battery replaced for the third time. The first battery lasted less than a year; the second battery less than three years. In both cases, voltage was around 11.5 volts when the (Volvo) battery was tested and replaced following starting problems.

The dealer says the charging system is normal, but I wonder if we have undiagnosed electrical gremlins.

Anyone else having these problems or have a cause diagnosed? Batteries on other makes of cars have usually lasted 5 years +.