ENERTEC Website Glossary of Terminology

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11th Dec, 2021

ENERTEC Website Glossary of Terminology


A Volt is a unit of measurement of electromotive force, expressing the electric tension or the difference in charge between two points. The symbol for Voltage is V. 

The pressure within the electrical circuit’s power source is also referred to as Voltage. It pushes the charged electrons (also called the current) through the conducting loop. This allows the Voltage to power the device. 

Volts measure the electric potential between two points.

Lead-acid Battery

A Lead-acid battery is the first type of rechargeable battery invented, and it can produce much power. 

Lead-acid batteries are also secondary cells. This means that they can be recharged. 

These kinds of batteries contain plates that consist of Lead and Lead Oxide, all suspended within a sulphuric acid solution. 

The Sulphuric acid will oxidise the lead plate, and this is what produces the electrical current. 

Lead-acid batteries are very popular as they are the least expensive batteries available. 

Lithium-ion Battery

Lithium-ion is an advanced battery technology that uses Lithium ions as an essential part of its electrochemistry.

They are also sometimes called Li-ion batteries, and are rechargeable batteries. 

These batteries are incredibly energy-dense and provide excellent value for money. 

Lithium Coin cells

Lithium coin cells were initially developed as a 3 Volt miniature power source for battery backup and low drain applications.

Due to their high energy density and longevity, they make excellent hard-wearing batteries. 

Lithium coin batteries come in a broad range of capacities and sizes. 

Nickel Cadmium Battery

A type of rechargeable battery using Nickel Oxide Hydroxide and metallic Cadmium as electrodes.

Nickel Metal Hydride Battery

Nickel metal Hydride batteries make excellent rechargeable batteries.

They function through Hydrogen-absorbing negative electrodes.

These batteries can last for many years and can be recharged several hundred times over their lifespan. 

Flow Battery

A flow battery is a kind of rechargeable battery where the electrolyte flows through one or more electrochemical cells coming from one or more tanks.

These batteries are fully rechargeable and are cost-effective options. >


A UPS (also called an Uninterrupted Power Supply) is most commonly used to keep computers powered up when there is a power failure. 

They normally keep a computer on for at least 15minutes, unless they are long-run units. 

A UPS can also provide great protection against power surges, and even save your computer. 

UPSes contain batteries that automatically start working when they detect that there is no longer mains supply electricity.


A Central Battery Unit (also known as a central battery system) is mostly used to power emergency lighting when there is a power outage. 

A CBU will ensure that your lights continue to be illuminated during emergency situations such as a fire, making these units excellent for emergency exit lighting.

VRLA Battery

A Valve-Regulated Lead-Acid Battery is a widely used rechargeable battery. 

These batteries are also known as sealed batteries or maintenance-free batteries. 

VRLA batteries are popular solutions for wheelchairs and mobility scooters because they are considered very safe due to their acid being suspended in fiber mats,and flammable or toxic gas output is negligible. 

SLA Battery

These batteries can be used in caravans, motorbikes, security systems, backup systems, generators, and more. 

SLA batteries are widely available and come in a range of sizes, Amperages,Voltages and brands. 

AGM Battery

Absorbent Glass Mat (or AGM) is a highly advanced lead-acid battery technology that caters to the high electrical demands of modern vehicles. 

These batteries provide superior power, are very resistant to deep vibration, and are maintenance-free. They are also completely sealed to prevent spillages.


A deep cycle battery can provide a steady amount of current over a prolonged period. They have higher resilience to repeated discharge and  recharge use. 


Spiral cell technology involves using several spiral wound cells,each with Lead plates with an inter cell separator, known to be excellent performers and are more effective than traditional flat-plate battery types.


Powerframe grids have been specially designed to minimise corrosion, maximise energy flow, and prevent failure.

This technology helps the battery to be more reliable and durable. These types of batteries are used extensively in vehicles.


SLI refers to Starting, Lighting and Ignition. All three of these processes consume energy that is provided by the battery.


OEMs are Original Equipment Manufacturer products. This means that the part is an original and very often one that has been recommended by the vehicle, device, or appliance manufacturer. 

Dry Cell Battery

Dry cell batteries refer to unique AGM (Absorbent Glass Mat) technology manufactured by the Discover Battery manufacturing company.

They are most commonly used from smaller and portable electrical appliances, through floor scrubbers and scissor lifts, to off-road, UPS and Solar installations. 

Mixtech EMX

Mixtech EMX technology combines 360-degree acid mixing technology  and advanced active materials.

Mixtech EFB

Mixtech EFB refers to an Enhanced Flooded Battery that is commonly used in stop-start vehicle batteries. 

These batteries can recover quickly after discharge and are also very cost-effective. >

Mixtech EGM

Also known as Enhanced Glass Mat Flooded Battery, EGM is a type of battery that has been designed to withstand extreme temperature fluctuations and vibration. 

They can also provide support to equipment with a high energy requirement. 


Calcium substitutes are commonly used in both positive and negative plates.

This substance is also commonly used in Lead-acid batteries. Calcium is a great Lithium alternative, as it is able to release as well as accept two electrons for every atom. 

Vented Flooded

Wet-cell batteries produce gas when charging. Flooded batteries have filler caps to allow gas emissions as well as electrolyte topping up capabilities.

Gel Sealed Battery

A gel sealed battery uses silica to turn the Sulfuric acid contained within the battery into a gel-like substance, which is then used as the electrolyte.


EV Dry Cell Batteries

EV stands for Electric Vehicle, and Dry Cell indicates that the battery does not possess a liquid electrolyte inside it. Internally, it consists of low moisture immobilized electrolytes in the form of a paste, which restricts the electrolyte from flowing. 


this refers to a special high-heat resistance high cold-cranking ability Lithium battery that can be installed under the bonnet of a vehicle as a starting battery, to replace conventional technologies. They are relatively expensive, but provide much longer life.

from several manufacturers these are now standard fitment.

they are also available for motorcycles, quad-bikes, generators, jet-skis and other leisure craft