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The Main Features of Sealed Lead Acid Batteries

Author: Minnie

Apr. 29, 2024

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The Main Features of Sealed Lead Acid Batteries

Here is our guide to the main features of sealed lead acid batteries making them the go to choice for various applications.

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Sealed Maintenance Free

The valve regulated, spill-proof construction of sealed lead acid batteries allows trouble-­free, safe operation in any position. There is no need to add electrolyte, as gases generated during charging are recombined in a unique “oxygen cycle”.

Easy Handling

No special handling precautions or shipping containers, either surface or air, are required for sealed lead acid batteries due to the leak-proof battery construction.

Economical

The high watt-hour per dollar value is made possible by the materials used in a sealed lead­ acid battery: they are readily available and lower in cost than alternative battery chemistries such as lithium batteries.

Power Sonic’s PG 2V series have a design life of 12+ years

Long Service Life

Sealed lead acid batteries can have a design life of anywhere from 3 – 5 years all the way up to 12+ years depending on the manufacturing process of the battery. There are many factors that affect the service life of the battery including temperature, for more information please view our technical manual.

Design Flexibility

Sealed Lead Acid batteries may be used in series and/or parallel to obtain choice of voltage and capacity. Due to recent design breakthroughs, the same battery may be used in either cyclic or standby applications. Our portfolio of battery products is one of the largest available in the industry.

Rugged Construction

The high-impact resistant battery case is made either of non-conductive ABS plastic. Large capacity batteries frequently have polypropylene cases; all of these materials impart great resistance to shock, vibration, chemicals and heat. Flame Retardant (FR) battery cases and lids are available across our portfolio of battery models.

If you are looking for more details, kindly visit kete.

Power Sonic’s PSH series are flame retardant to UL94-V0

Compact Design

Power Sonic use state of the art design, high grade materials, and a carefully controlled plate-making process to provide excellent output per cell. The high energy density provides superior power/volume and power/weight ratios.

High Discharge Rate

Low internal resistance allows discharge currents of up to ten times the rated capacity of the battery. Relatively small batteries may thus be specified in applications requiring high peak currents.

Long Shelf Life

A low self-discharge rate may allow storage of fully charged batteries for up to a year depending on storage temperatures. Please view our technical manual for more information on the affects of temperature on shelf life.

Wide Operating Temperature

Power Sonic lead acid batteries may be discharged over a temperature range of -4°F (-20°C) to 140°F (60°C), and charged at temperatures ranging from – 5°F (-15°C) to 122°F (50°C).

Deep Discharge Recovery

Special separators, advanced plate composition and a carefully balanced electrolyte system greatly improve the ability of recovering from excessively deep discharge, this is evident in Power Sonic’s Pure Lead, deep cycle gel and tubular gel batteries.

What Is A Sealed Lead Acid Battery

What is a Sealed Lead Acid Battery?



The sealed lead acid battery is by far one of the most popular batteries that we receive questions on here at High-Tech Battery. I have decided (finally) to post a few of the most common questions that I hear from customers regarding sealed lead acid batteries here in our Battery Information Center, so here it goes.


What exactly is a sealed lead acid battery?

A sealed lead acid battery is what is originally known as a VRLA battery, or a valve regulated lead acid battery. These batteries are a 100% rechargeable, and based off a lead acid design. These batteries are designed to be maintenance free (do not require the user to add water to the cells), and spill proof. These batteries can be mounted in any position and still operate to their full capacity without spilling a drop of acid.

You may be wondering where exactly the valve regulated part of the sealed lead acid battery comes into play. Every SLA (sealed lead acid) battery is designed with a special safety release valve. These valves act as a emergency pressure release system that activate to alleviate the build up of gases within the SLA battery. During a period of an extremely high rate of charge (extreme over-charging), gases will be generated inside the battery that could potentially build up to critical levels and force its way out - via exploding a side of the battery out, or a simple crack in one of the cell dividers. To prevent this from happening, all SLA batteries are designed with these small pressure release valves.


Are there different types of sealed lead acid batteries?

Yes, there are two different types of SLA batteries out on the market today - AGM, and GEL batteries.

AGM batteries utilize a special plating process which optimizes the effectiveness of electrolyte reaching the batteries lead plates. AGM stands for absorbed glass mat, which is essentially what the entire process consists of. A mat consisting of very thin glass fibers woven together is placed between the internal lead plates of the battery. This glass mat is capable of absorbing and holding the optimum amount of electrolyte between the plates for the lifetime of the battery. This technology cuts down on the use of electrolyte and increases the efficiency and power of the battery.

The infamous GEL battery (confused with AGM SLA batteries on a daily basis) utilize a special gel based mixture between the plates of the battery instead of the typical electrolyte found in the common flooded lead acid batteries (think car battery). In this case, the gel is a combination of silica fume and standard sulfuric acid to create a type of gelified electrolyte. This design enables the battery to suffer much less internal corrosion, thus increasing the overall life of the battery - assuming you take care of it properly

If you want to learn more, please visit our website What’s a Sealed Lead-Acid Battery.

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