Early warnings you can check yourself between services
You do not need a workshop to keep an eye on a battery; you need two minutes a month and a little discipline. The cheapest tool is a plug-in voltmeter for the 12V socket, sold in every accessory shop for the price of a coffee round. Read it before the first start of the day: 12.5-12.6V is a full, healthy battery, 12.2V means it is living half-charged, and anything starting with 11 means the battery is either failing or something is draining it overnight. Take the reading at the same time of day for a fair comparison, because a battery straight after a drive always looks better than it is.
Your ears and eyes do the rest. A crank that sounds slower on the first start than it did last month is capacity leaving the building. Open the bonnet quarterly and look at three things: white or green crust on the terminals, which strangles current flow; case sides that bulge outward, which is heat damage and a replacement trigger on its own; and dampness or a sharp sulphur smell around the battery, which means it is gassing or leaking. On most UAE-market batteries there is also a date code stamped into the case or printed on a label, so you can establish the true age of the battery in a car you bought second-hand rather than trusting the seller's memory.