Heat, not cold, is the biggest enemy of a car battery in Pakistan — high under-hood temperatures accelerate the internal chemical breakdown that eventually kills a battery, so a battery rated for 5 years in a temperate climate might only last 3 here.
Frequent very short trips never let the alternator fully recharge the battery after the extra draw of starting the engine, leaving it in a chronic partial-charge state that shortens its life. If most of your driving is short hops, an occasional longer drive helps top it back up.
Keep terminals clean — a light coating of petroleum jelly on the posts after cleaning off any corrosion prevents buildup and keeps current flowing efficiently. Turn off headlights, interior lights, and accessories before shutting off the engine, since even a small parasitic draw compounds over days if the car sits unused.
If you're going away for more than a couple of weeks, disconnect the negative terminal or use a trickle charger — a battery that sits fully discharged for an extended period rarely recovers fully.