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

9 comments

Send me notifications when other members comment.

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
It depends on how long the string is.
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
Why doesb it take 8 hours to charge my '20100mAh portable charger
Cancel

-ADS BY GOOGLE

File Extensions and File Formats

SearchCompliance

  • risk management

    Risk management is the process of identifying, assessing and controlling threats to an organization's capital and earnings.

  • compliance as a service (CaaS)

    Compliance as a Service (CaaS) is a cloud service service level agreement (SLA) that specified how a managed service provider (...

  • data protection impact assessment (DPIA)

    A data protection impact assessment (DPIA) is a process designed to help organizations determine how data processing systems, ...

SearchSecurity

  • Port Scan

    A port scan is a series of messages sent by someone attempting to break into a computer to learn which computer network services ...

  • DMZ (networking)

    In computer networks, a DMZ (demilitarized zone), also sometimes known as a perimeter network or a screened subnetwork, is a ...

  • quantum supremacy

    Quantum supremacy is the experimental demonstration of a quantum computer's dominance and advantage over classic computers by ...

SearchHealthIT

SearchDisasterRecovery

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • disaster recovery team

    A disaster recovery team is a group of individuals focused on planning, implementing, maintaining, auditing and testing an ...

  • cloud insurance

    Cloud insurance is any type of financial or data protection obtained by a cloud service provider. 

SearchStorage

Close