Many drivers upgrade their modern cars with additional features and electronics like touchscreens, Android boxes, 360-degree cameras, subwoofers, and safety sensors, yet they often stick with the traditional battery. Factory-installed batteries are usually basic and primarily designed for starting the engine.

A technician inspects a car's engine compartment. Photo: Thanh Phat

Adding more electrical devices while keeping the original battery can lead to problems such as flickering lights, minor electrical faults, and even complete power loss, preventing the car from starting. Do Hoang Trung, an auto technician in Hanoi, explained that a car battery is not just for starting; it powers the entire electrical system. "Adding devices like 360 cameras, Android boxes, or subwoofers while using a standard battery can lead to power shortages, flickering lights, and frequent minor faults," he said.

Trung pointed out a common misconception: "All batteries are the same, as long as they start the car." In reality, different cars and driving habits require different batteries. SLI batteries power basic car functions and are suitable for cars with few electronics and no i Start/Stop. EFB batteries have higher charge-discharge cycles and better load capacity than SLI batteries, lasting about 1.5 times longer. They are designed for cars with basic i Start/Stop systems. AGM batteries offer high discharge rates, fast charging, and twice the lifespan of traditional batteries, making them ideal for high-end cars with many electronic features.

Two Puma battery models. Photo: Thanh Phat

EFB technology is an upgrade from traditional flooded batteries. It can handle charging voltages up to 15.5V, allowing for faster charging. Polyester separators retain active material, prevent widespread corrosion, and maintain stable current during continuous operation. AGM batteries are sealed, leak-proof, durable, and stable even in harsh climates. They are well-suited for modern vehicles with advanced electronic features.

A representative from Thanh Phat, the distributor of Puma batteries (part of Clarios, USA), explained that AGM and EFB technologies extend battery life and improve long-term stability. Drivers should choose the right battery for their car and usage. If a car sits unused for more than two weeks, the battery voltage should be checked. If it's below 12.5V, the battery should be recharged.

A car using a Puma battery. Photo: Thanh Phat

If jump-starting is necessary due to a weak battery, the car battery should be recharged with a dedicated charger. For cars with added entertainment screens and other power-hungry devices, upgrading to a higher-capacity battery is recommended. Regular inspection of battery terminals is essential to prevent rust or loose connections, which are major causes of power loss. For cars frequently driven short distances (in urban areas), supplemental battery charging is advisable every three months.

According to Thanh Phat, choosing the right battery ensures reliable vehicle operation, saves time, and prevents frustrating situations like a dead battery.

Tuan Vu