A current flow for one hour measured in amperes (amps). Abbreviated "Ah" and commonly called "amp-hour," it is widely used to rate how long it takes for a battery to discharge. For smaller batteries, a milliampere-hour (mAh) rating is used. For example, a 500 mAh battery means it will release 500 milliamps of current at a specific voltage for one hour before it is discharged. See ampere.
Amp-Hours and Watt-Hours
Batteries can be rated in amp-hours (Ah) or watt-hours (Wh) as shown in these examples for a digital camera. The bottom battery is equivalent to 3.3 Wh, while the top battery is equivalent to 667 mAh.
Amp-Hours and Watt-Hours
Batteries can be rated in amp-hours (Ah) or watt-hours (Wh) as shown in these examples for a digital camera. The bottom battery is equivalent to 3.3 Wh, while the top battery is equivalent to 667 mAh.
 | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2008 The Computer Language Company Inc. All rights reserved. |
Additional Resources
- Intel maintains commitment to education
- Despite dismal economic times, Intel, creator of the Classmate PC, an associated software stack, and a pedagogical model for its use in schools, has reaffirmed its commitment to education. Today, the company announced that it had achieved its goal of 1 million volunteer hours from its employees. According...
- Blog posts 2008-12-05
- Comcast to launch meter to track Web usage
- It only seemed fair that Comcast would give its customers a way to track their Web usage, seeing how the company imposed a a 250 GB limit on the Web data that its customers use in a month. But when the company announced that limit earlier this year, there was...
- Blog posts 2008-12-03
- Soshiku=a reason for cell phones in school
- Soshiku=a reason for cell phones in schoolExcellent!Mailing this one out to those people I know that need it, and those people I know that should code like it.RE: Soshiku=a reason for cell phones in schoolI like the idea for students reminding themselves. However, now add a parent as a...
- Discussion threads 2008-12-03
- Richard Solo 1200 - Backup Battery with Flashlight
- If you own an Apple iPhone 3G and use it relentlessly throughout the day, you've probably noticed its battery life often does not last as long as you would like. This is acceptable with something like a music player, but for a cell phone, it's a little more important for...
- Product reviews 2008-12-02
- Podcast: gadgets for Christmas, iPod lovin' and the Blu-ray war
- Zack Whittaker has taken a few days off to "get his head together", but last week took half an hour out to record a podcast with his best friend, Elliot Harrison, who has stepped up to the firing squad to cover this week. Some notes for...
- Blog posts 2008-12-02
- Vista SP2: What's inside?
- Vista SP2: What's inside?Windows ExplorerAre they going to fix Windows Explorer? Things like remembering views, better copy performance, etc?RE: Vista SP2: What's inside?Better remembering of views in Explorer would be really nice.RE: Vista SP2: What's inside?Are you using it in a networked environment? A lot of people who...
- Discussion threads 2008-12-02
- Whassup with Netbooks?
- Whassup with Netbooks?netbook problemI completely agree that netbooks would be better off being marketed as a phone, with the option of a significant discount with an ISP contract. The problem netbooks have is that they are almost a single commodity. All of the big name producers use the exact same...
- Discussion threads 2008-12-02
- The most slacking-est time of the year
- Is this what your office looks like from November to January?Statistically speaking, you're not doing any work today -- or so poll after poll out this time of year about "lost productivity hours" and "distracted workers" claims. You probably won't work for the rest of the week,...
- Blog posts 2008-12-01
- 2009 Nissan 370Z
- Photo gallery:2009 Nissan 370ZNissan's Z car tradition goes back to 1969, when the company was called Datsun and the Z launched with a 240 designation. At the 2008 Los Angeles Auto Show, the latest Z came out as the 2009 Nissan 370Z, its new name reflecting a bigger engine and...
- Product reviews 2008-12-01
- Some seriously good advice from "Narg"
- Some seriously good advice from "Narg"A compromise?How about a terminal near the employee entrance that is hooked up to a computerized time-clock? We use timeclock application in Sharepoint that would work fine, and get over the whole issue without having something that can't be tracked electronically as easily.RE: Some seriously...
- Discussion threads 2008-11-30
- Why C wins: the cold realities of abstraction
- Why C wins: the cold realities of abstractionPoints of inflectionMy guess is that if we had a valid means of quantifying "abstractiveness" versus effectiveness we'd find a curve with clear points of inflection - and C on one of those.POSIX itself surprised it was not named SOSIX is an abstraction....
- Discussion threads 2008-11-29
- Is on-demand slowly killing traditional broadcasting?
- I'm not a big TV watcher to be honest. In the UK, we have the "licence fee" which you need to pay the government before you even connect the telly to the wall. If you don't, you can bet your arse you'll have armed police storming the windows to your...
- Blog posts 2008-11-26
- A fully customizable home robot
- Imagine a completely customizable robot with selectable software options. Buy one component, and it will take care of your lawn. Buy another one and it will clean your toilets. With a third one, it will pick up UPS or FedEx deliveries on your porch. If you are taking some vacation,...
- Blog posts 2008-11-25
- Samsung Saga (Verizon Wireless)
- As Verizon Wireless is wont to do, the carrier is unleashing all its goodies right before the holiday season, from the RIM BlackBerry Storm to the HTC Touch Pro to the subject of this review, the Samsung Saga. Like the Samsung Ace for Sprint, the Saga offers world-roaming capabilities but...
- Product reviews 2008-11-24
- From private jets to car pool? Detroit may be getting the message.
- From private jets to car pool? Detroit may be getting the message.different kind of bailoutApparently, the Detroit Three are bailed themeselves out of their jets....There won't be three in two years. Chrysler can't survive alone. There'll be two US owned.RE: From private jets to car pool? Detroit may...
- Discussion threads 2008-11-24
- Going back to Windows Media Center
- Going back to Windows Media CenterWindows Media CenterI am also a Time Warner customer who quit their DVR boxes in favor of Windows Media Center. For over a year, I've had great controlling two digital cable boxes with an IR blaster and using Media Center as my DVR. ...
- Discussion threads 2008-11-24
- The case for Scala
- Programming languages are like screwdrivers for developers. One size does not fit all, so good programmers keep several in their tool belt. The problem is, new languages are coming out all the time and you've only got so much room on your belt and in your schedule to learn them....
- Blog posts 2008-11-24
- New MacBook Pro performance degrades with the battery removed
- New MacBook Pro performance degrades with the battery removedActually......the batteries degrade faster if they are not used. I have an HP Laptop about 2 years old, when I stored it last December it had a battery life of about 2-2.5 hours. When I took it out in August the...
- Discussion threads 2008-11-23
- LA goes electric
- LA goes electric150 miles won't even get you to Fresno"the car will go 150 miles on a charge that gets me just about to San Francisco and back"Oops. LA to SF one way is about 380 miles, taking around 6 hours. Looks like you'll have to add two 3-hour recharging...
- Discussion threads 2008-11-23
- The brutal truth - but not, I think, about Vista.
- The brutal truth - but not, I think, about Vista.Er... You DO realize......that a "minimally qualifying" system hasn't been made in this millennium... Right?Empirical evidence?Try installing Vista on a minimally qualified system, add the typical worker's software, drivers, and other standard cruft required by companies, and tell us how long...
- Discussion threads 2008-11-22
Neighboring Terms
Premier Vendor Content Whitepapers, webcasts & resources from our Power Center Sponsors
- Got a sports fan on your gift list?
-
Beat the crowds and save big on their favorite sports gear! Shop today
- Learn more >>
- Like the red carpet treatment? Join Intel's community of IT pros
-
Become an Intel Premier IT Professional member to access the most up-to-date IT best practices and learn from IT leaders. Joining is free and quick to do, and provides you with exceptional benefits.
- Sign-up free and get exclusive access to select IT@Intel white papers and more >>
Fusion
- There’s a new energy coming from the people of AMD. Its the power of Fusion.
- Learn about the power of fusion at work and the industry-changing impact of accelerated computing.
-
- View AMD video, case studies, blogs, forums, and more on ZDNet »
-
