Reveiw Greenest Desktop Replacement

Desktop Replacement Winner:

Update: Since we initially posted these results, we retested the MacBook Pro in its native OS X operating system (rather than in Vista using Boot Camp), and have adjusted its numbers accordingly. It still remains third overall, as its power consumption in OS X actually increased when we re-ran our tests. See further updates throughout this page. After recalculating the scores for all the notebooks in the category,lifebook t4010 battery the scores for the desktop replacements are as follows:

Toshiba Satellite A355 (84.8)

Runners-Up

Second Place: HP ProBook 4710s (82.4)

Third Place: Apple MacBook Pro (17-inch) (76.9)

Fourth Place:fpcbp89 (64.3)

This category also saw a neck-and-neck race between the HP ProBook 4710s and fpcbp136, with the Toshiba system eking out the win by 1.9 points (Editor's note: No longer the case. See update above).

Battery and Charging Results

The Satellite A355’s main strengths lie in its low power consumption when charging (6334.2 watts), which is more than 1300 watts below the ProBook, the next closest competitor, and less than half that of the lifebook s6510 battery (13744.8 watts). The only area where Toshiba’s system did not fare well was battery life, as its endurance of 2:21 was more than 2 hours behind the 17-inch MacBook Pro, the category leader. Update: When recharging in OS X, the MacBook Pro used an average of 62.4 Watts, and took 3 hours and 20 minutes to fully recharge—that’s an increase of 12 minutes and 4.7 watts compared to its scores when running in Boot Camp mode.

 

	Battery Life (minutes)	Recharging time (minutes)	Average power while recharging (watts)	Total Power used while recharging (watts)
Apple MB Pro 17-inch	413	200	62.4	12480
Dell Studio XPS 16	211	184	74.7	13744.8
HP ProBook 4710s	233	111	68.9	7647.9
Toshiba Satellite A355	141	138	45.9	6334.2

Power Consumption During Use

With the exception of our Movie test (where it placed second), the fujitsu fpcbp148 used the least amount of power for every other benchmark. Only the ProBook, with an identical average power use (25.2 watts) during the Web-surfing test, came close. The ProBook was the next closest. Update: The MacBook Pro also consumed more power during our Web surf test (30.1 watts vs. 27.1 watts), and when idle (25.9 watts vs. 24.7 watts). However, power use decreased while playing a movie (34.1 watts vs. 39.1 watts), and since PCMark Vantage only runs in a Windows environment, that score remained the same.lifebook u1010 battery

 

	Average Power During Web Surfing Test	Average Power During PC Mark Vantage Test	Average Power During Movie Playback	Average Power While Idle
Apple MB Pro 17-inch	30.1	43.8	34.1	25.9
Dell Studio XPS 16	34.4	43	37.6	32.3
HP ProBook 4710s	25.2	36.9	30.2	23.3
Toshiba Satellite A355	25.2	35.5	31.8	18.8

Third-Party Ratings

The Satellite’s EPEAT Gold rating of 21 was good, but 1 point behind the MacBook Pro; lifebook a6110 battery Greenpeace rating of 5.3 (out of 10) was the best of the other companies in the category, but it’s nothing to write home about.

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Toshiba Satellite L505-ES5018

Consumers on a budget have to be careful where they spend their cash when buying a new notebook. The fujitsu fpcbp148 isn’t going to dazzle you by any means, but for those whose needs are basic, this $587 mainstream system ($529 through Best Buy) gets the job done with a modicum of style. However, a last-generation processor and poor battery life means that your money can be better spent elsewhere, even if you want to stick with Toshiba.

Editors’ Note:Portions of this review were taken from our earlier review of the pa3399u-1brs battery.

Design

For a sub-$600 system, the PA3534U-1BRS Battery is attractive but not exactly striking. Its lid and keyboard deck sport Toshiba’s Fusion Finish with a grey Breeze pattern—essentially, lines running diagonally across the system. Both the lid and deck are glossy, but the neutral color hides fingerprints. The design is carried across the touchpad, making it all but invisible when viewed from certain angles. While this is a clever touch, the fact that it is also flush with the deck had us looking for it a little harder than we should have. The keyboard and bezel are a matte black that contrasts nicely with the rest of the chassis.pa3399u-2bas battery



At 15.1 x 10.2 x 1.6 inches and an even 6 pounds, the SatellitePA3451U-1BRS battery isn’t exactly travel-friendly, but it’s a reasonable size and weight for a 15.6-inch system. Still, the HP G62t is a svelter 5.4 pounds.



Unlike the PA3450U-1BRS battery there are no media playback buttons above the keyboard; a power button is all you get. Toshiba continues to use an old-school volume wheel, which in this case is on the front edge of the chassis.

Keyboard and Touchpad

The gritty matte silver keyboard PA3465U-1BRS battery on the L505 matches the deck, and provided very good feedback, although we did notice it had a bit of flex. Thanks to the wide 15.6-inch screen, Toshiba was also able to cram a full number pad to the right without sacrificing the size of the keyboard.



The touchpad is generously sized, and its slightly rough surface resulted in almost no friction when moving our finger across it. As lifebook t4010 battery mentioned previously, however, its nearly seamless blending with the surrounding deck sometimes made it difficult to locate. The silver mouse buttons below were huge and crisp.

Display and Audio

The 15.6-inch screen on fpcbp89 was suitably bright, and its resolution of 1366 x 768 is more than adequate for its size. However, the viewing angles could have been better; we had to tilt the display back further than we normally do in order for it not to appear washed out. When set at the ideal angle, though, watching movies on the 16:9 aspect ratio display was enjoyable. When watching clips from Saturday Night Live, colors were bright and crisp, and blacks were deep.



The stereo speakers on the top of the deck were moderately loud and had decent separation while watching movies. As we expected in this price range, bass was virtually nonexistent on Notorious B.I.G’s “Big Poppa.” fpcbp136

Ports and Webcam

Arrayed along the right side of the lifebook s6510 battery are two USB ports, modem, and a Kensington lock slot; on the left is VGA out, Ethernet, headphone and mic, and an eSATA port that doubles as USB; unfortunately, this port doesn’t include Toshiba’s Sleep-and-Charge technology. Also lacking is an HDMI port, which is far from a deal-breaker, but can be found on such competitors as the HP G62t.



A 1.3-megapixel webcam and microphone above the display provided passable images fujitsu fpcbp148 in a video chat over Skype; while a little drab, a caller could make out the color of our eyes. However, there was a bit of motion blur when we waved our hand about two feet away from the webcam.

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The life of lithium batteries may be extended : temperature

A lithium-ion battery is 300-500 discharge / charge cycles total. The laptop battery prefers partial discharges rather than full discharges. Frequent full discharges should be avoided whenever possible. In contrast, the battery should be recharged more frequently, or use a larger battery. The memory effect is not an issue, even if carried out unscheduled charges.

Although lithium-ion batteries do not suffer performance losses because of the memory effect, show powerbook g4 battery with a built-in fuel gauge one of engineers known as “digital memory”. This is the reason: Short discharges with appropriate charges will not yield the periodic calibration needed to synchronize the fuel gauge with battery level.

A purposely conducted full discharge followed by recharging after 30 charges corrects this problem. Downloading the inspiron 6400 battery until the shutoff of the device meets this criterion. If this is ignored, the fuel gauge is crucial unreliable. (Find out more in ‘Choosing the right battery for portable computers’, Part Two).

Aging of lithium-ion batteries is an issue that is often neglected. Lithium-based inspiron 6000 battery have a life expectancy of 2 to 3 years. The clock starts ticking as soon as the battery leaves the factory. The capacity loss is already reflected by a higher internal resistance caused by oxidation. Finally, the cell resistance reaches a point where he can give the stored energy is no longer, even if the battery is fully charged.

The increase in internal resistance also applies to lithium-ion batteries with cobalt-based, a chemical which is used in laptops and cell phones used. A smaller energy density lithium-ion vgp bps2c vgp bps2a batteries based on manganese, which is also known as spinel battery that holds in the internal resistance in a lifetime, but loses capacity due to the chemical decomposition.

The speed of aging of lithium-ion batteries is determined by the temperature and charge state. Figure 1 shows the capacity loss as a function of these two parameters.

Figure 1: Permanent capacity loss of lithium-ion pa3399u 2brs pa3465u-1brs batteries as a function of emperature and charge state.

High charge levels and high temperatures accelerate the permanent loss of capacity. Chemical improvements have the benefits of stored lithium-ion batteries increases.

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