Browse Definitions:
Definition

milliampere hour (mAh)

A milliampere hour (mAh) is 1000th of an ampere hour ( Ah ). Both measures are commonly used to describe the energy charge that a battery will hold and how long a device will run before the battery needs recharging.

For example, an IBM Thinkpad 365 with an Nickel-Metal Hydride 9.6 voltage battery that is stated to provide a charge of 2800 mAh offers from 2.5 to 5 hours of battery use without recharge.

This was last updated in March 2011

Join the conversation

7 comments

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

This does not at all explain what the a mAh really indicates. To determine how long a device will last given a battery that has a certain mAh rating you would need to know how much current the device draws. If you have a the current draw of a device in mA you can simply take the mAh number and divide by the mA draw to get how many hours the device can run on that battery. mAh is an indication of stored charge.
Cancel
How long is a piece of string?
Cancel
What is the equivalent hour capacity of 1800 mAh because my battery.... is 1800 mAh?
Cancel
Basically everyone the higher the 'mah' the longer your battery will hold charge. Your volts or (V) on the battery must remain the same or you'll kill your device. All the best. Danny
Cancel
Its confusing to me because the measurement of an amp already includes a time factor. Coulombs/second is an amp.
Cancel
Hello
I want your help
I recently bought an adapter which has two outputs! Every single one is 1000 mah! My problem is that I have a powerbank which has 5200 mah capacity and it needs an 1.0A adapter and it doesn't charge from mine one! What should I do?
Cancel
In battery operated computers which call for a 4400mAh battery, what affect would a battery with 5200mAh capacity have on the computer? Would it damage it in any way?
Cancel

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • smart contract

    A smart contract, also known as a cryptocontract, is a computer program that directly controls the transfer of digital currencies...

  • risk map (risk heat map)

    A risk map, also known as a risk heat map, is a data visualization tool for communicating specific risks an organization faces. A...

  • internal audit (IA)

    An internal audit (IA) is an organizational initiative to monitor and analyze its own business operations in order to determine ...

SearchSecurity

SearchHealthIT

SearchDisasterRecovery

  • incident management plan (IMP)

    An incident management plan (IMP), sometimes called an incident response plan or emergency management plan, is a document that ...

  • crisis communication

    Crisis communication is a method of corresponding with people and organizations during a disruptive event to provide them with ...

  • Zerto

    Zerto is a storage software vendor that specializes in enterprise-class business continuity and disaster recovery in virtual and ...

SearchStorage

  • SSD write cycle

    An SSD write cycle is the process of programming data to a NAND flash memory chip in a solid-state storage device.

  • data storage

    Data storage is the collective methods and technologies that capture and retain digital information on electromagnetic, optical ...

  • hard disk

    A hard disk is part of a unit -- often called a disk drive, hard drive or hard disk drive -- that stores and provides relatively ...

SearchSolidStateStorage

  • hybrid hard disk drive (HDD)

    A hybrid hard disk drive is an electromechanical spinning hard disk that contains some amount of NAND Flash memory.

Close