Lead acid batteries have been used for decades and are still one of the most reliable energy storage options today. You will find them in cars, inverters, backup power systems, and even small industrial equipment. Their popularity comes from their affordability, durability, and ability to provide stable power during outages.
However, there are many misconceptions about how these batteries work and how they should be maintained. These myths often lead to poor usage practices, reduced performance, and a shorter battery lifespan.
This blog clears up 8 common myths about lead acid batteries and shares the correct facts, helping you take better care of your battery and get the best performance from it.
Myth 1: Lead Acid Batteries Don’t Need Maintenance
Fact: Regular maintenance is important for long life.
Many people believe that once a lead acid battery is installed, it does not require any care. This is not true, especially for flooded lead acid batteries used in home inverters.
A typical battery needs:
- Periodic water topping (only with distilled water)
- Cleaning of terminals to prevent corrosion
- Checking for loose connections
- Monitoring the charge level
Neglecting maintenance causes the plates inside the battery to dry out and reduces power backup capacity. A few minutes of regular inspection can add years to the battery’s life.
Myth 2: All Lead Acid Batteries Are the Same
Fact: They come in different types with different uses.
Lead acid batteries are available in multiple designs, each made for a specific purpose:
Type | Description | Ideal Use |
| Flooded Battery | Requires regular maintenance | Home inverters, power backup systems |
| AGM (Absorbent Glass Mat) | Sealed, vibration resistant | Cars, bikes, UPS systems |
| Gel Battery | Low maintenance, safe, spill-proof | Medical devices, solar systems |
Choosing the wrong type may reduce performance. For example, using a car battery for an inverter may work temporarily but will lead to quick wear and tear. Always buy the right battery for the right application.
Myth 3: Overcharging Doesn’t Harm the Battery
Fact: Overcharging can permanently damage the battery.
Some users leave the battery connected to charging round the clock, assuming “more charging means more backup.” In reality, overcharging leads to:
- Overheating of battery plates
- Water loss from the electrolyte
- Permanent damage to internal components
- Shortened battery life
Using a high-quality inverter/charger with auto-cut or a smart charge controller helps prevent overcharging and keeps the battery healthy.
Myth 4: Lead Acid Batteries Can Be Fully Discharged Safely
Fact: Deep discharge weakens the battery over time.
Allowing a lead acid battery to completely discharge reduces its ability to hold charge again. Frequent deep discharge causes:
- Sulphation on the battery plates
- Slower charging
- Poor backup duration
It is best to keep the battery between 40% to 80% charge. For inverters, this simply means do not run heavy appliances during long power cuts to avoid draining the battery entirely.
Myth 5: Bigger Batteries Always Mean More Power
Fact: Capacity must match the inverter or vehicle specifications.
A larger battery does not automatically mean better performance. What matters is the right compatibility between:
- Battery capacity (Ah rating)
- Inverter output capacity (VA rating)
- Load requirement (How many devices you want to run)
If the battery is too large for the inverter, it may charge slowly and not work efficiently. If it is too small, it will drain quickly and wear out faster.
Choosing the correct battery capacity ensures balanced performance and long lifespan.
Myth 6: Lead Acid Batteries Are Outdated Technology
Fact: They are still reliable, affordable, and widely used.
While lithium batteries have become more common, lead acid batteries still hold a strong position in:
- Home backup power solutions
- Vehicles and transport systems
- Solar power setups
- Industrial applications
They are cost-effective, proven, efficient, and easy to maintain. This makes them a practical choice for households and small businesses.
Myth 7: Distilled Water and Tap Water Are the Same
Fact: Only distilled water should be used in inverter batteries.
Many users top up batteries with tap water thinking it’s harmless. Tap water contains:
- Minerals
- Salts
- Chlorine
- Impurities
These substances react with the internal plates, causing corrosion and reducing battery efficiency.
Only use distilled water, which is free from minerals and safe for battery use.
Myth 8: Storing Batteries Unused Keeps Them Healthy
Fact: Batteries naturally discharge over time and need periodic charging.
If a battery is left unused for months, it slowly loses charge. If the charge level goes too low, the internal chemical reaction becomes weak, leading to sulphation and permanent damage.
Whether used or not, a battery should be charged periodically (every 30–45 days). This keeps it active, functional, and ready when needed.
Conclusion
Lead acid batteries are dependable and long-lasting when used correctly. Understanding the facts behind common myths can help you maintain your battery better, improve backup performance, and extend its lifespan. Simple practices like using distilled water, preventing deep discharge, avoiding overcharging, and selecting the right battery type can make a noticeable difference.
Looking for a reliable battery for your home or vehicle?
Vaibhav Enterprises offers a wide range of Amaron, Exide, and Trontek lead-acid batteries designed for long-lasting performance and trusted power backup.
📞 Contact us today to find the perfect battery for your needs.