How to choose a car battery
Most passenger cars use a single 12 V lead-acid starting battery. In the Americas the case is described by a BCI group (for example 24F, 35, 48/H6 or 94R/H7); in Europe by EN/DIN sizes (L1–L6, LB); and in Asia by JIS codes.
Match the case size, hold-down and terminal position: an inverted polarity battery may not reach the cables.
Start-stop vehicles need EFB or AGM; never downgrade from AGM.
Meet or exceed the manufacturer's minimum CCA, especially in cold climates.
Many modern cars require the new battery to be registered with a diagnostic tool.
Hybrids and EVs also have a 12 V auxiliary battery, often a smaller AGM or lithium unit; it is not the traction battery.