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HP 425, 4320t, 620, 625, ProBook 4520s, 4720s Computer batteries


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Rechargeable 11.10V 8800mAh HP 4520s notebook batteries from au/computer-battery/hp-bq350aa.htm

HP ProBook 4520s Review: The HP ProBook 4520s is a small and medium business notebook that replaces the older 4510s from last year. The new model bumps the configuration from the older Intel Core 2 Duo family of processors to the newer Intel Core line, including the Core i3, i5 and i7 processors. In this review we look at what's changed and how the latest model stacks up against its predecessor.

# Intel Core i5 430M Processor (2.26GHz, 3MB cache)
# Microsoft Windows 7 Professional (32-bit)
# 15.6-inch LED-backlit anti-glare HD display (1366 x 768)
# Intel GMA HD Integrated Graphics
# 4GB DDR2 800MHz RAM
# 320GB 7200RPM HDD
# LightScribe DVD+/-RW Optical Drive
# Atheros AR9285 BGN Wifi, Bluetooth 2.1, 1Gb LAN
# 6-Cell 47WHr Battery
# Dimensions: 14.64 x 9.83 x 1.09-inches
# Weight: Starting at 5.27lbs

Build and Design
The HP ProBook 4520s has a clean and semi-rugged outside appearance; a step up from the previous generation model. The screen cover instead of being plastic on the 4510s is now brushed metal which feels stronger and looks much nicer. The new metal cover keeps a clean appearance, hides most fingerprints and resists mild scratching from day to day abuse. The inside gets the same treatment with the bronze, anodized, brushed-metal finish for its palmrest and speaker grill.

Besides those changes the notebook retains much of the same design as the previous model. The keyboard is a chiclet design with a glossy black plastic inlay, continuing to the screen bezel which shares the same look. The bottom of the notebook has the same clean design at the expense of removing access to all user-upgradable parts.

Build quality is very good and a step up from the older model. The brushed metal lid gives the 4520s some much needed strength and screen protection that the plastic lid on the previous model lacked. The palmrest and speaker grill also gained some rigidity and now offer very little flex under strong pressure. The chassis as a whole feels very well built but still a step below full business notebooks like the EliteBook or ThinkPad series. The keyboard tray has some minor flex under pressure which wouldn't be a problem on the more expensive models.

Another area of questionable design is the lack of upgrade access which has its strengths and weaknesses. The solid bottom cover has very little flex, which you might find if the bottom was covered in individual panels. On the other hand, the lack of access makes it more difficult to replace defective components or upgrade items down the line. au/fujitsu-computer-battery.htm

Screen and Speakers
The ProBook 4520s comes equipped with a 15.6" anti-glare display with a 16:9 widescreen ratio. At 1366 x 768 pixels, this 720p high-definition display is perfectly usable and features good color and contrast. We know many people are concerned about the transition from 16:10 to 16:9 ratio screens (because this means less vertical resolution) but the difference is so minor that the vast majority of notebook users will never have a problem.

The speakers on the HP ProBook 4520s performed roughly on average with other small and medium business notebooks. Compared to most consumer notebook speakers they left a lot to be desired, but for light music listening or catching your favorite TV show streaming on the road they should be more than adequate. Peak volume levels were fine for a small or medium size room. Bass and midrange were lacking, but that was par for the course with most notebooks in this class.

Keyboard and Touchpad
The full-size keyboard on the 4520s shares the same design as the one found on the 4510s and provides fantastic spacing between keys for typing as well as a dedicated number pad (a major plus for businesses that use their computers for number crunching or data entry). Each key is relatively flat with a nice matte texture and the keys sit above a glossy black support frame. The support frame surrounding the keys is quite firm thanks to the design of the chassis which adds additional support for the keyboard. The only obvious area of flex in the keyboard is when you press on the number pad keys. Keep in mind, however, that we received a pre-production unit, and HP claims that the production units shipping to customers have even better support against flex.

The individual key presses are quiet without loud clicking sounds as you type. The depth of each key press is excellent, though some people may dislike the flat, chicklet-style keys. Overall the keyboard layout is extremely nice for a 15-inch laptop.

HP updated the touchpad on the 4520s from the older 4510s, with the notebook now including a button-free Synaptics ClickPad. The primary difference is a larger surface to use for making gestures and a cleaner appearance without additional buttons. With that said, we experienced some difficulties adjusting to the new format. If you are a notebook user who likes to rest their fingers on the touchpad buttons while you move your cursor around the screen you will be in for a world of surprise. Even in the defined touchpad button zones the touchpad picks up your stationary finger input and tries to incorporate it into a multitouch gesture. Pinch zoom is the gesture that most frequently activates, although even after all multitouch gestures were disabled we still noticed the cursor would “hop" around the desktop. This is very similar to the experience we had with the Dell Inspiron 11z which had an Elantech button-free touchpad. (hp battery ) Making the touchpad button areas a “dead zone" would completely resolve this problem.

Ports and Features
Port selection on the HP ProBook 4520s is good for a small-business notebook but it seems there is room leftover that could have been used for additional ports. The notebook has three USB 2.0 ports, one eSATA/USB combo port, VGA and HDMI-out, LAN, dialup modem, and audio jacks. The system also features an ExpressCard/34 slot and SDHC-card reader for expansion.

Performance and Benchmarks
System performance on the HP ProBook 4520s is very good with the newer 2010 Intel Core processor lineup. HP offers preconfigured models with the Intel Core i3 350M processor as well as the Intel Core i5 430M, which is included in our review unit. If you take the route of going custom, HP lets you chose from a much larger range of processors up to the 2.66GHz Core i7 620M as well as ATI Radeon 4350 dedicated graphics.

Compared to the previous ProBook 4510s we reviewed with the same listing price the 4520 improved in many ways. The newer Intel GMA HD graphics increased 3D performance and the newer processor is much faster than the old Core 2 Duo seen in the past model. We saw gains of over 30% in some overall system benchmarks such as PCMark05. Multimedia playback on the 4520s is very good, handling downloaded HD movies without a problem. HD Flash playback on sites such as YouTube played without any stutter or lag, and with the HDMI-out port this system could easily pull double duty as a multimedia hub.

One area we enjoyed seeing on the new 4520s is the included 7200RPM drive as standard whereas the older 4510s of the same price used a slower 5400RPM drive. While it might not be as fast as the latest SSD, it helps keep application load times down and increases responsiveness of the operating system.

Heat and Noise
The HP ProBook performed exceptionally well in our thermal tests, keeping case temperatures well within our comfortable range. Under a full load the system barely broke a sweat with a peak recorded body temperature of 81 degrees Fahrenheit on the top and 89 degrees Fahrenheit on the bottom. During this time system noise levels were very reasonable and a hair above ambient levels.

Conclusion (hp probook 4420s battery )
The HP ProBook 4520s offers many improvements from the previous Core 2 Duo-based 4510s. The metal exterior cladding improves looks over the older plastic finish and gives the body a stronger feel. Inside, the brushed metal surface is used above and below the keyboard. Another change is the Synaptics ClickPad which offers a spacious flush-mount touch surface at the expense of integrating the left and right mouse buttons. Looks are improved but in use we found the all-in-one touchpad surface to cause problems with resting fingers on the touchpad surface over the buttons.

Overall the 4520s brings huge improvements in the looks department from the older model with equally big performance increases with the new 2010 Intel Core processors. The Intel Core i5 processor in the 4520s performed very well in our tests, offering improvements of more than 30% over the previous model. If you are in the market for a small-business rig the ProBook 4520s is worth checking out, but spring for the larger battery if you plan on traveling.

Battery Life
The HP ProBook 4520s comes with a 47Wh 6-cell HSTNN-CB1A battery standard, but for the same price the older 4510s configuration gave you a 63Wh 8-cell battery. This difference kept the 4520s from achieving the same battery life as the previous model. In our battery test with the screen brightness reduced to 70%, wireless active and refreshing a webpage every 60 seconds, and Windows 7 on the Balanced profile the notebook only stayed on for 4 hours and 18 minutes. This is less than the $749 configuration of the 4510s which stayed on for 5 hours and 10 minutes.

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