Frequently Asked Questions
What is an AGM battery?
An AGM (Absorbed Glass Mat) battery is a VRLA (Valve-regulated lead acid) battery with immobilized electrolyte absorbed in a fine glass fiber separator tightly placed between the battery plates. This ensures uniform contact between the active mass and electrolyte, providing up to three times higher charge-discharge capacity than a conventional battery. The AGM battery is also equipped with a pressure-regulating valve for safely venting gases during operation, hence the name VRLA. This type of battery is designed especially for start-stop and regenerative braking applications.
What is cold cranking amperage?
It is the current that a new, fully charged battery can continuously deliver for 10 seconds, ensuring a minimum voltage of 7.5V at -18°C (EN standard).
What is a maintenance-free battery?
A maintenance-free battery is one that does not require the addition of distilled water, provided the vehicle’s charging system is working correctly.
How often should I check the battery?
For batteries with an indicator (magic eye), the state of charge and electrolyte level can be assessed by the color: - Clear: low level, needs refill - Black: good level, but discharged - Green: good level and charged.
What should I do if I have problems with the battery?
If your car starts harder or doesn’t start at all, follow these steps:
I. If your battery has a hydrometer (magic eye):
Check the indicator color on the battery cap: green, black, or white.
a. Green: battery is in good condition. If there are still starting issues, visit the nearest authorized ROMBAT service center.
Find a service center: http://www.rombat.ro/#locatii
b. Black: battery is discharged. Recharge it using a charger for 24 hours (if available) or visit an authorized service center. After charging, verify the battery at ROMBAT. Also check the electrical system for over-consumption or alternator issues.
c. White: Visit an authorized service center for a detailed check-up.
II. If the battery lacks a hydrometer, visit the nearest ROMBAT service center for a full evaluation.
What is an EFB battery?
An EFB (Enhanced Flooded Battery) is an advanced lead-acid battery, significantly improved over the conventional version, offering double the life cycle and designed specifically for start-stop applications.
What is reserve capacity?
Reserve capacity is the number of minutes a battery can sustain a 25A discharge at 25°C until the voltage drops to 10.5V (EN standard).
What effect does excessive heat have on the battery?
Excessive heat causes water evaporation, which happens much faster than under normal conditions. It also negatively affects the positive plates.
How do I choose the right battery?
Check your car manual for the recommended battery. You can also refer to the battery manufacturer's catalog—available at the reseller—for guidance, although it is for reference purposes.
How can I use the battery correctly and extend its life?
- - Check the battery visually every 6 months—look at the magic eye color
- - Before winter, test the battery at a ROMBAT service center and recharge it if needed
- - If driving mostly short distances, regularly check and charge the battery
- - Use only factory-approved devices and avoid direct connections to the battery
- - If accidentally discharged, charge it promptly using a charger
What is battery capacity?
Battery capacity refers to the amount of electric charge stored in the battery. It is measured in ampere-hours (Ah).
What is battery lifespan?
Battery lifespan is the period during which the battery maintains acceptable performance. It is typically measured in years.
What effect does low temperature have on the battery?
Low temperatures significantly reduce battery power. At -18°C, the battery delivers only about 40% of its power compared to performance at 20°C.
What happens if I use a battery with a higher cold cranking amperage?
In this case, the engine starts more easily, especially in cold climates, and the charging system is not negatively affected.
