Difference between SMF and Tubular Battery Technologies

Difference between SMF and Tubular Battery Technologies

In the realm of backup power solutions, the choice of battery technology plays a pivotal role in ensuring performance and reliability. Among the diverse options available, Sealed Maintenance-Free (SMF) and Tubular batteries stand out for their unique characteristics and applications. This article aims to elucidate the differences between these two technologies and introduce the advanced SMF/VRLA batteries from Okaya.

Sealed Maintenance-Free (SMF) Batteries

SMF batteries, also known as VRLA (Valve-Regulated Lead-Acid) batteries, are renowned for their 'maintenance-free' nature. These batteries are sealed, negating the need for regular watering, which is a significant advantage in remote or unmanned locations or in applications with infrequent use, like emergency lighting systems.

Advantages of SMF Batteries:

•    Low maintenance requirements
•    Long service life
•    Compact and lightweight, facilitating easy installation
•    Ideal for environments where maintenance is challenging or infrequent use


Lower peak power output compared to tubular batteries, possibly unsuitable for high-power short-duration applications

Tubular Batteries

Tubular batteries are engineered for high performance and reliability, especially in demanding backup power applications. These are particularly beneficial in scenarios that demand high power for short periods, like in data centers or hospitals.

Advantages of Tubular Batteries:

•    High peak power output
•    Better suited for applications needing short-duration high power
•    Greater resistance to deep discharge, making them ideal for prolonged backup requirements.


Tubular Batteries

•    Larger and heavier, which can pose installation challenges in certain environments.

Okaya SMF/VRLA Batteries: A Class Apart

Okaya takes pride in presenting our state-of-the-art SMF/VRLA batteries, designed to power your inverters effortlessly and reliably. Our fully sealed batteries ensure a maintenance-free experience, making them perfect for home, office, or industrial settings.

Exclusive Features of Okaya SMF/VRLA Batteries:

•    Range of 12V SMF batteries from 7.2 Ah to 200 Ah, meeting JIS C8702 standards
•    Low-Pressure Venting System
•    Heavy-Duty Grids for longevity
•    Minimal Self-Discharge
•    Efficient Gas Recombination System
•    Wide Operating Temperature Range
•    Eco-friendly manufacturing processes


•    Telecom Communication Equipment
•    Fire Alarm and Security Systems
•    Medical Instruments
•    Solar Street Lighting
•    Computer Backup
•    Automated Guided Vehicles
•    Lawn Mowers


Q 1: What Are the Key Differences Between SMF and Tubular Batteries in Terms of Maintenance and Lifespan?

Answer: SMF (Sealed Maintenance-Free) batteries, such as Okaya's SMF/VRLA series, are designed to be low-maintenance, requiring no regular watering, making them ideal for difficult-to-access locations or environments where regular maintenance is not feasible. They typically have a long service life due to their sealed design. On the other hand, Tubular batteries may require more frequent maintenance, such as checking electrolyte levels. However, they often offer a longer lifespan in demanding applications due to their robust design and high resistance to deep discharge.

Q 2: Which Battery Type Is More Suitable for High-Power Short-Duration Applications, SMF or Tubular?

Answer: Tubular batteries are generally more suitable for high-power, short-duration applications. They are designed to deliver high peak power output, which is essential in settings like data centers, hospitals, and other critical systems where short bursts of high power are needed. SMF batteries, including Okaya's SMF/VRLA series, are more suited for applications where the battery is used less frequently or in situations where maintenance is a challenge.

Q 3: Can Okaya SMF/VRLA Batteries Be Used in a Wide Range of Temperatures and Are They Environmentally Friendly?

Answer: Yes, Okaya SMF/VRLA batteries are designed to operate efficiently across a wide range of temperatures, making them versatile for various climates and conditions. Additionally, they are manufactured in modern, eco-friendly facilities, reflecting Okaya's commitment to environmental sustainability. These batteries are also designed with a low self-discharge rate and a gas recombination system, enhancing their efficiency and environmental friendliness.


The choice between SMF and Tubular battery technologies hinges on specific application requirements. For scenarios where maintenance is challenging or infrequent usage is expected, SMF batteries like Okaya’s SMF/VRLA series are ideal. Conversely, Tubular batteries are more suited for high-power, short-duration demands or prolonged backup needs. Okaya’s advanced SMF/VRLA batteries offer a blend of reliability, durability, and technological excellence, making them a superior choice for various applications.