It does depend on where you purchase the battery from, Halfords will replace like for like but the new batteries warranty stops at the same time as the date of the first one purchased. I usually purchase my batteries from a local motor factor and he will give me a new receipt if I ever have a failure, so as long as my batteries fail within the warranty period I never need to buy another, saying that I have only ever had one fail within the warranty period.

If you plan to keep a car a battery that comes with a 4 year warranty is a good idea, I have a customer who purchased a non branded battery from Euro cap parts, 2 year warranty and when it failed after 6 months they replaced it with another that lasted another 6 months or so. He returned that and was told it must be his car and gave him a partial refund. If a manufacturer does not brand there product what does that say?

Steve