Flooded, EFB or AGM: matching the chemistry to a start-stop car
The rule a good workshop follows is simple: never downgrade. AGM must be replaced with AGM. EFB can be replaced with EFB or upgraded to AGM. A conventional car can take any of the three, though paying the AGM premium on a 2012 Corolla buys you nothing. One UAE-specific wrinkle: AGM batteries dislike extreme heat even more than flooded ones, which is exactly why many German cars mount them in the boot or under a seat rather than in the engine bay. If your battery lives in the boot, it is almost certainly AGM, and the replacement job involves vent tubes and trim panels that take extra time.
How do you know what you have? The label on the current battery says AGM or EFB explicitly, the owner's manual specifies it, and any vendor quoting through tamam should ask for your car's make, model and year precisely so they can price the correct chemistry rather than the cheapest one. A quote for a start-stop German saloon that comes in at the bottom of the market range is usually a flooded battery wearing an optimistic price tag.