What we test
A no-start can come from the battery, the charging system, the starter or a simple bad connection. We check the likely culprits.
The battery's charge and health
State of charge is how full the battery is now. State of health is how much of its original capability is left. An electronic tester estimates health against the battery's rated cold cranking amps, so we can tell a flat but healthy battery from a charged but worn-out one.
The charging system
With the engine running, the alternator should be recharging the battery. If it isn't, a new battery will simply go flat again, so we check before recommending one.
Starting
How the battery voltage holds up while the engine cranks shows whether it can still deliver the current your starter needs.
Terminal and connection check
Sometimes it isn't the battery at all. A loose clamp or corroded terminal, the white or green crust you sometimes see on battery posts, stops current getting through and can look exactly like a dead battery. Salt air near the coast and summer heat both speed this up.
We check the terminals, clamps and cables, and clean and tighten them where needed. If that fixes the problem, you don't need a new battery.
What the readings mean
| Reading | What it usually means |
|---|---|
| About 12.6 – 12.8 V, engine off and rested | Battery fully charged (it may still be worn; charge is not health) |
| Below about 12.4 V, engine off | Battery needs recharging |
| About 13.7 – 14.7 V, engine running | Charging system working normally on most cars |
| Close to the engine-off reading, engine running | Alternator may not be charging |
Figures from Varta, GS Yuasa and Interstate Batteries. Many modern cars have smart alternators that deliberately vary the charging voltage, so readings are one clue among several. See battery, alternator or starter? for the symptoms of each.
After the test
- Battery healthy but flat: a jump start and a proper drive.
- Battery worn out: the full fitted price for the right replacement battery, fitted on the spot if you approve.
- Connection problem: cleaned and tightened.
- Charging or starter fault:we explain what we found. If the car can't be driven, we can arrange recovery to your preferred garage.
Wondering how long your battery has left? Read how long car batteries last in Dubai and our battery glossary.
Battery testing questions
Is the battery test really free?
Yes. We test the battery before recommending any replacement, at no charge. If the battery isn't the problem, we tell you, and you are under no obligation to buy anything.
Can my battery be fully charged and still be bad?
Yes. Charge and health are different things. An old battery can show a full voltage and still be unable to deliver enough current to start the engine. A proper test estimates its remaining health, not just its charge.
How often should I get my battery tested in Dubai?
Every year once the battery is two years old, and before summer. Heat does most of the damage, so a test in spring catches a weak battery before the hottest months.
My battery keeps going flat overnight. Is it the battery?
Not always. Something may be draining it while the car is parked, such as a light, a dashcam or a module that stays awake, or the alternator may not be recharging it. Testing the battery and charging system is the first step to finding out.
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