CD ROM Drive
Lead Acid Battery
Power to Weight Ratio
Processor Heat Sink
AC is the acronym for Alternating Current. Used to supply electricity commercially as electric power. Alternating Current allows for the most efficient transmission of energy.
- AC Adapter
Device used to convert AC (Alternating Current) to DC (Direct Current) for use with electronic devices.
A chemical compound that is opposite to an acid. It donates hydroxide ions. Also known as a base. Some common alkaline compounds are baking soda, sodium carbonate. In batteries Potassium Hydroxide is a commonly used alkaline.
Amps short for Amperes (A) is the unit of measurement of current.
The positive elctrode in a battery or electrochemical reaction.
A vessel made up of a number of cells which produce and store an electric charge.
- Battery Cell
A vessel containing various chemicals which produce electricity as a result of the reactions taking place between these chemicals.
- Battery Cycle
A complete discharge followed by a complete charge of a battery.
- Bay / Drive Bay
Specially designed housing for batteries and other peripherals on a laptop computer.
A "tansition metal", with the symbol Cd. This metal is relatively rare and is toxic. Widely used in batteries. The use of which is slowly being reduced.
A naturally occurring chemical element, with the symbol C. Vital for our existence due to its unique chemical characteristics. Diamond and Graphite are a form of Carbon.
The negative electrode in a battery or electrochemical reaction.
- CD ROM Drive
Optical storage device. Hardware that allows the user to play and view data held on a CD(compact Disc).
Electric charge held by a battery at a given time. Also the term "to charge a battery", refers to filling the battery up with electric charge for the remainder of the capacity.
Device used to charge a rechargeable battery.
An alternative to the original supplied with the laptop computer. Similar capacity and ratings to the original but cheaper in price.
DC is the acronym for Direct Current. This is used for low voltage applications.
The process of removing all the charge from the battery.
- Dry Cell
A type of battery. The common AA batteries are of this type. Uses Zinc and Carbon as electrodes and an acidic paste as an electrolyte. The name is derived from its dry nature.
- Electrochemical Reaction
A reaction between chemicals which produce electrons.
This is a conductor which allows an electric current to flow through
Electron is a sub-atomic particle with a negative charge. They generate an electric current when they move.
A chemical compound that becomes an electrically conductive medium by electrically charging the different atoms.
- External Charger
A device used to charge batteries without the need for the battery to be inserted into a device like a laptop computer.
A plastic/metallic piece which makes part of the outer casing of the laptop computer whan put together.
- Fuel Gauge
A set of LED lights on the battery showing the relative capacity of the battery. The capacity is also shown as numerical value (a percentage) by Power Management software on the laptop computer.
- Gel Cell
A modern version of a Lead Acid battery, where the acid is substituted by a gel based electrolyte.
- Hard Drive
Device used to store data
The lightest element and is found as a gas.
An atom or a group of atoms with an electric charge.
A portable personal computer.
A toxic metal with the symbol Pb, which stands for Plumbum (latin), with a very high density.
- Lead Acid Battery
A type of battery that is commonly used in motor vehicles. It uses Lead plates as elctrodes and a very strong acid as an electrolyte.
An alkali metal, with the symbol Li. A very light-weight metal. It is usually mixed with Aluminium and Magnesium for light-weight alloys.
A type of battery chemistry where a Carbon compound and Lithium oxide are used as electrodes with an electrolyte.
- Li-Ion Polymer
Works on the same principle as Li-Ion, but the electrolyte used is a polymer resembling a thin plastic film.
- Lithium Oxide
Compound formed by burning, oxidising Lithium. It is used as an electrode in a Lithium Ion cell.
- Manganese Dioxide
Compound formed by oxidising Manganese, a metal. Used as an electrode in an Alkaline battery.
Refers to RAM, Random Access Memory or volatile memory. An integral component of the laptop computer.
- Memory Effect
An effect caused by continuall recharging a battery before it is fully discharged. As a result it only remembers the amount of capacity charged and the full capacity of the battery is not reached.
Milliamp-hours (mAh) is the capacity of a battery. 1amp = 1000milliamps.
A metal with the symbol Ni. Widely used to construct various metal alloys. The use of Nickel in batteries is being reduced now.
Nickel Cadmium cell. A type of battery chemistry where Nickel and Cadmium are used as the electrodes and Potassium Hydroxide as the electrolyte.
Nickel Metal Hydride. Another type of battery chemistry where Nickel, Nickel alloys are used as electrodes and Potassium Hydroxide as the electrolyte.
OEM stands for Original Equipment Manufacturer. A third party manufacturer producing goods under licence from companies like Sony, Toshiba etc.
- Organic Liquids
A chemical compound containing Carbon, but in a liquid state. This is not a strict definition as some chemical compounds containing Carbon are excluded like Carbon Monoxide and Carbon Dioxide.
Charging a battery above the prescribed time or even after it has reached full capacity.
A non-metallic element with the symbol, O. It is found in our atmosphere as a diatomic gas, o2. It constitutes about 21% of our atmosphere. Essential for respiration by animals and plants and combustion.
Combining with Oxygen, where electrons are removed from an atom or a molecule (becomes positively charged).
- Potassium Hydroxide
A chemical compound, which is a very stong alkaline. Used as an electrolyte in batteries.
Power is measured in Watts(W). It is the product of potential difference or voltage(V) and Current(A).
- Power Management
Software, usually suppied with laptop computers. Helps manage power consumption by controlling various processes taking place within the laptop computer
- Power to Weight Ratio
Power to Weight ratio is the Power produced, divided by the battery's weight. A light weight battery providing the same amount of power as a much heavier version would have a higher power to weight to ratio.
Primary refers to the cell type of a battery. Primary batteries are non-rechargable.
Processor is also known as CPU or Central Processing Unit. This does all or most of the data processing. The two most popular brands are AMD and Intel
- Processor Heat Sink
The heat sink sits on top of the processor and conducts heat away from the processor. It is constructed with metals like Copper and Aluminium, which are very good heat conductors. It also has a fan on top of the heat sink which circulates the air increasing the heat dissipation. The processor gets really hot whilst the computer is working. If no form of cooling is provided the processor overheats and it can literally get cooked. Cooler Master is one of the leading manufacturers of processor coolers and heat sinks.
Random Access Memory. A device used to store data temporarily. Increasing the RAM on a laptop computer results in an increased performance
Process by which the chemical reaction producing electricity is reversed within a battery. Where the chemical return to the previous state where they are ready to exchange electrons and Ions to produce electricity.
- Run Time
The time taken for a battery to power a laptop computer from a fully charged state to a discharged state.
The cell type of a battery where these are rechargeable.
The process of self-discharge occurs while the battery is not in use. The chemicals react much slowly and lose their electric capacity.
Short-circuit occurs when a metallic wrie or a metallic object is placed between the contacts of a battery. This causes electricity to flow without any resistance. Due to the reduced resistance a large amount of electricity flows producing a lot of heat. This can lead to a fire hazard.
A valuable metal with the symbol Ag. The symbol Ag is derived from its latin name Argentum.
- Smart Battery
Battery with in-built micro-processor allowing them to communicate with the laptop computer. The laptop computer can monitor battery performance, output voltage and temperature.
An alkali metal with a symbol Na, derived from the latin word Natrium. Found commonly as a compound, Sodium Chloride or table salt.
A non metallic element with the symbol S, known to ancients. A widely used chemical. It is commonly found in matches, medicines and gunpowder.
- Sulphuric Acid
A very strong mineral acid. Also known as battery acid due to its use in Lead Acid batteries.
A function in laptop computers where most processes including background processes are halted temporarily to conserve power.
Refers to the capability of fitting with or working with a wide variety of laptop computer models.
Measured in volts is the potential difference between two points in ana electric circuit.
The unit of measurement of Voltage with the symbol V.
A very widely used metal with the symbol Zn. It is used to galvanize other metals, in alloys and as pigments in paints.
- Zinc Sulphate
A water soluble chemical compound used as an electrolyte in batteries and also for Zinc plating.
Use the ChemFinder for more technical information on the various chemical compounds listed above. Check the Interactive Periodic Table for more information on the different elements listed above.