Battery capacity and longevity

Battery capacity and longevity
have been key sticking points in the development of the electric car. But GM is promising that it will become a leader in laptop battery development.

Besides the manufacturing plant, GM announced that it will open a research center for advanced dell 6y270 battery,dell 75uyf battery development and that it will partner with the University of Michigan to develop a specialized curriculum for battery engineers.

“The design, development and production of advanced batteries must be a core Compaq EVO N100 battery competency for GM,” Rick Wagoner, the automaker’s chairman and CEO, said at the announcement at the Detroit auto show.

For years, Michigan has watched as the domestic automotive industry contracted, leading to painful job cuts and economic hardship. But GM’s announcements means that Michigan will again take a leadership role in auto development and manufacturing.

If Michigan plays its cards right, other Compaq Evo N1020V battery companies will want to locate here.

There’s still work to be done. Wagoner said that the plans to open the battery development center and the manufacturing plant in Michigan are contingent on negotiations with state and local officials. GM wants to locate these facilities in Michigan. The state’s political leaders must do all they can to keep this work in the state.

Battery Capacity and Power Consumption

There are to things that will be the basis for determining how long a laptop computer should run on batteries. Of course, the overall capacity of the battery is the easiest to determine and understand. All batteries can store a fixed amount of energy in them. This is rated in mAh or milliampere-hours. I could go into technical details but suffice to say, the higher the mAh that a battery is rated out, the more energy that is stored in the Compaq Evo N1000C battery.

So, why is the battery capacity important? Of two systems that use the same amount of power, the one with a higher mAh rated battery will last longer. This makes comparison easy for the batteries themselves. The problem is that no two laptop configurations will draw the same amount of power.

Power consumption of a laptop depends upon all of the components that make up the system. So, a system with a lower power consumption CPU will generally last longer if all parts are equal but they almost never are. It gets even more complicated because the power consumption can also vary depending upon how the laptop is being used. Heavy disk uses draws more power than little usage.

All isn’t lost for consumers though. In general the size of the laptop will also equate to how much power it uses. For example, a desktop replacement will generally draw more power than a thin and light. A thin and light draws more power than an ultraportable and a netbook draws even less still Compaq Evo N115 battery.

Manufacturer Claims

Now that the basics are out of the way, how can a manufacturer come up with a claim of something like ten hours of running time for a laptop yet a user in real world use may get only half as much time? It all has to do with how the manufacturers conduct their battery life tests. The most common of these is a function of the MobileMark benchmarking suite from BapCo. It simulates computer usage through sampled application use via programs such as Quicktime, Photoshop, Flash, Office and WinZip.

Now, this is a valid test that simulates usage, but it is how the test simulates usage. The test generally has the CPU idle during much of the test on the basis that many people are either idle or their applications are awaiting user input. It also doesn’t set various power settings within the OS. Manufacturers often use various tricks such as decreasing the display brightness to the lowest levels and turning all of the battery saving features to their maximum the running time so they can get the highest run times possible Compaq EVO N620C Battery.