Maintenance-Free Batteries do not require any topping up of water during their lifespan. They are designed to be low-maintenance, so users don’t need to check electrolyte levels regularly. Generally these batteries have a longer lifespan because they’re less prone to sulfation (buildup on the battery plates). They also handle extreme temperatures better, which helps with longevity in various climates. These batteries tend to be more expensive due to their advanced technology and materials. However, the reduced need for maintenance and longer lifespan can justify the higher initial investment.

Conventional Liquid (Flooded) Batteries require regular maintenance, including checking and topping off the electrolyte levels with distilled water to keep them performing well. They are designed with vent caps, allowing users to access the cells. While typically less durable than maintenance-free batteries, Conventional Flooded batteries can still offer good performance with proper maintenance. However, they may wear out faster if neglected. Usually less expensive upfront, which can be attractive to budget-conscious consumers. However, they might incur additional maintenance costs over time.

An EFB Battery (Enhanced Flooded Battery) is a more advanced version of the regular maintenance-free battery, EFBs use thicker plates and improved material, providing better durability and charging performance. EFBs still contain liquid electrolyte but are optimized to withstand more frequent charge and discharge cycles.

• Use Case: Designed for vehicles with basic Start-Stop technology, where the battery frequently shuts off and starts the engine, as well as for vehicles requiring slightly higher performance than a standard flooded battery.
• Performance: More durable than a regular maintenance-free battery and handles partial-state-of-charge (PSOC) situations better, meaning it can perform well even when it isn’t fully charged.
• Cost: More expensive than regular maintenance-free batteries but generally less costly than AGM batteries.
• Lifespan: Longer lifespan than regular maintenance-free batteries, especially in vehicles with Start-Stop technology.

The AGM battery (Absorbent Glass Mat Battery) is a more-advanced version of Maintenance-Free Batteries that use a special glass mat to absorb the electrolyte, preventing spills and allowing for more efficient operation. They are designed to handle frequent deep discharges, with high resistance to vibration and temperature variations.

• Use Case: Ideal for high-performance vehicles, vehicles with advanced Start-Stop systems, and those with additional power demands, like infotainment systems, heated seats, and other electronic accessories.
• Performance: AGM batteries offer superior power output, quick recharging, and handle deep cycling very well. They are more resilient in extreme conditions and suitable for modern cars with high electrical demands.
• Cost: The most expensive option due to advanced construction and superior performance characteristics.
• Lifespan: Long-lasting, especially in high-demand or start-stop applications, as it tolerates frequent cycling and holds a charge well over time.

Batteries with modern technologies such as EFB and AGM are monitored by a battery sensor and are closely linked with the battery management system (BMS). If a wrong battery is used, this can cause deficiencies in the automatic start-stop system, failures of comfort functions and reduced service life of the battery.

1. Firstly, one needs to understand the purpose of the sound system. Are you installing it for the sake of driving with loud music or mainly to play it loud while parked?

2. Before checking the battery, inspect if your vehicle’s alternator can handle the increased electrical demand, especially if you’ve upgraded your sound system.

3. For those driving with music on, it’s recommended to get a battery with a high CCA (Cold Cranking Amps) rating, as this indicates the battery’s maximum discharge ability.

4. For those primarily playing music while parked, opt for a battery with both high CCA and RC (Reserve Capacity) values. RC indicates how long a battery can provide power, so a higher value is better.

It is advisable to read your car’s user manual and check the specific requirements for your starter battery. 

Alternately, you could choose the ampere of the battery to fit the engine used, such as

• 1300cc engine should be used with a size of battery 45 amps – 60 amps.

• 1600cc engine should be used with a size of battery 45 amps – 60 amps.

• 1800cc engine should be used with a size of battery 45 amps – 60 amps.

• 2000cc engine should be used with a size of battery 60 amps – 75 amps.

• 2200cc engine should be used with a size of battery 60 amps – 75 amps.

• 2400cc engine should be used with a size of battery 60 amps – 75 amps.

• 3000cc engine should be used with a size of battery 60 amps – 75 amps.