Why can't I warranty the battery for my car if I only do 1500 miles a year?

I own a Suzuki Wagon R+ automatic. I am disabled and only drive about 1500 miles a year. Last week I had to call out the RAC because my car wouldn't start. The battery had basically had it and a new battery was installed. However, I was told that I had to do at least 2000 miles a year to warranty the battery. Why is this necessary? (My previous battery had lasted me an amazing 11 years!)

Asked on 24 January 2017 by Mr P. Cowell

Answered by Honest John
In order to keep the battery in a reasonable state of charge. If it becomes too run down it loses its capacity to hold a full charge. If you have a garage, your answer is a 'battery conditioning float charger' that can be left connected to the battery in the car without disconnecting it from the car.
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