A battery is the one part of a car that gives almost no warning before it strands you, and the one part of a home inverter that decides whether the fans stay on through a cut. Both are commodity goods sold at wildly different prices by the same handful of manufacturers — which is precisely why buying one online ought to be simpler than walking into a shop, not harder.

So everything that normally gets decided at the counter is printed on the listing instead. The MRP and the discount. The warranty, split into its full-replacement and pro rata halves rather than quoted as one flattering number. The capacity, the type, the dimensions and the terminal side. And both prices — with your old battery exchanged, and without — so the scrap value is a published figure rather than something argued about on your doorstep.

Every battery listed here is brand new and carries the manufacturer's own warranty, with its month and year of manufacture printed on the case. Nothing is refurbished and nothing is relabelled. Automotive batteries need no servicing of any kind: a sealed maintenance-free battery is fitted and then forgotten until its warranty runs out.

If you are not sure what fits, do not guess and do not order on hope. Send us the model, the variant and the year — or the registration number — and we will confirm the exact battery, both prices and the warranty before you pay for anything.