Technical Battery Questions

Monday, January 8, 2018

Laptop charger

Laptop charger (Laptop adapter). It is laptop charger. Traditional laptop charger can only output single voltage to a laptop model, this traditional laptop power adapter is a single band notebook charger.

Basic composition

Input line + charger body + output line + connector

Important classification

By brand

The world's leading brand of several popular laptop chargers (in alphabetical order):
Acer(laptop world famous brand)
Apple(laptop world famous brand)
Asus (laptop world famous brand)
Dell (laptop world famous brand)
Hp (a world famous notebook computer, merged with COMPAQ)
Lenovo (laptop world famous, has merged with IBM)
Toshiba (laptop world famous brand)

By purpose

AC use (such as home, office use AC are called AC)2,
DC use (such as the car, the aircraft are used DC are called DC)

By output voltage and current

(Charger behind the label, generally written behind the OUTPUT, write the number of V, how much A):
12V series, Asus more commonly used, such as ASUS 12V3A
15V series, Toshiba more commonly used, such as TOSHIBA 15V3A, 15V4A, 15V5A, etc.
16V series, Sony , IBM more commonly used, such as SONY 16V4A, IBM 16V4.5A
18.5V series, Hp is more commonly used, such as HP 18.5V3.5A
19V series, such as Acer 19V3.42A, TOSHIBA 19V3.42A
19.5V series, such as Dell 19.5V3.34A, SONY 19.5V4.1A
20V series, such as DELL 20V3.5A, LENOVO 20V3.25A
24V series, such as Apple 24V1.875A

working principle

As the family's power supply is generally about 100V-240V (AC, referred to as AC),
The power supply on the car and the plane are generally about 12V (DC, referred to as DC), but these three common power supply is unstable, can not be charged directly to the laptop, otherwise it will damage the battery and laptop. Laptop power demand for a stable constant voltage DC.
Therefore, the working principle of laptop power adapter is simple: that is, the use of unstable power switching power supply principle, through the conversion circuit into a laptop needs constant voltage DC, power supply and charging laptop.
It is noteworthy that: This conversion circuit, there must be a protection circuit (over-current protection circuit, over-voltage protection circuit short circuit protection circuit, etc.), to prevent accidents, the laptop will not burn.

Purchase advice

Select a good brand

Do not buy cut-off substandard products, normal use no problem, in the event of an accident, it will burn your laptop, save dozens of pieces but burned thousands of notebook worth the candle, (jerry-building, common practice chaos Standard power, such as the actual only 19V3.42A, but the standard 19V4.74A, this will cause the charge is very slow, or even damage the battery and laptop, there are some protection removed, this more horrible accident occurs will burn the laptop .)
I suggest you fund to buy a professional brand, a professional-brand products will not cause damage to the battery and laptop, but also to protect the circuit)

Identify the voltage, current and connector

Look at the original laptop which brand, the original charger behind the label is written on the number of V, how many A (generally written in the OUTPUT behind), the charger connector is round or square, or porous, Do not buy the wrong, or even fooled.
For example, your original charger is 18.5V 3.5A that is to say that we must buy output 18.5V, as current higher than 3.5A can be.

Sunday, January 7, 2018

How long does a laptop battery normally last?

Some people who want buy a new laptop want to know some details about the laptop. Like the size of the laptop、the price and so on...

Most people are more care about how long does the laptop battery normally last. Those people who normally working outside with laptop want to know how long will their laptop battery can last, because they normally use a laptop without connect the charger. If the laptop battery can not last a long time, it will have effect on their job.

How long does a laptop battery normally last?

Home laptops are usually last 2 to 3 hours. A lot of business laptops last 3 to 4 hours or even longer. At the same time, the more you use the laptop, the more worse performance will be , with more than 1 year using, the original battery can last 3 hours may only last 2 hours. If the laptop battery is not well maintained, it may only last more than 1 hour. At the same time, the use of the battery is also divided into several cases:
Fewer programs and more programs to run. You play the game is the most power-hungry, generally the battery can hold 2 hours. There are DVD drive with CD-ROM, CPU computing resources occupy more programs, these are more power-hungry. When using a laptop, it's best to turn off unused devices. If you do not get online, put the card off. if you do not use the process, you can turn off unused process. There are also some related online battery optimization protection software, these software can play a role.

They way about how to maintain your Apple laptop battery

For the people who have Apple laptop.How to maintain your Apple laptop battery?

Here are some simple tips for Apple MacBook battery maintenance:

Screen brightness

When we use a MacBook laptop outside, due to the use of the battery, then you can properly adjust the screen brightness down. Because the screen is very power-hungry. If you lower the brightness, you can save power, let the laptop to use longer.
The function keys F1 and F2 on the keyboard adjust the brightness of the screen, and you can adjust it manually to make the brightness lower.
In the system default, the laptop automatically adjusts the screen brightness according to the ambient light, of course, we can also set it to manual mode. Open the "Monitor" option in System Preferences.
Then in the display settings, turn off the "automatically adjust the brightness" option.

Energy saving setting

Through the energy-saving Mac system settings, you can let the system automatically save a lot of energy consumption, such as how many minutes without use of computer, it will automatically turn off the screen.
In the system preferences, click on the "Energy Saver" option in the energy-saving settings for the battery window, you can set the screen off time, whether to turn off the hard drive, and automatically use the battery to dim the screen.

Operating temperature

Laptop Battery temperature is particularly sensitive, it has a relatively ideal operating temperature, once the temperature is too high will reduce the battery life. If the battery temperature exceeds 35 ° C, it will cause permanent damage to the battery, that is, to reduce the capacity of the battery, such as the original can hold 1 liters of water, and now can only be installed in half a liter of water.
Battery temperature overheating will be harmful to the battery, of course, the temperature is too low nor does it work. When the temperature you play 10 ° C, the available capacity of the battery will be reduced, that is, after a full charge, the use of time without the original length. However, the temperature is too low will not permanently damage the battery 10 million, as long as the temperature returned to normal, its capacity can be returned to normal.
So, if you are using a MacBook laptop when the ambient temperature is high, then it is recommended not to charge the Mac. Because the battery charging, the temperature will increase, coupled with the high ambient temperature, the battery temperature will be exceeded.

Regular charge and discharge

Apple MacBook notebook built-in lithium-ion polymer battery, we need to keep the battery inside it fluidity, so as to extend the battery life. If you are often on a business trip, you will often charge the MacBook, there is no problem. For example, you can use the battery when the company goes to work and use the power to charge it when you get home.
If you are always using at home, under normal circumstances we will plug the battery, so that you can not use the battery, resulting in the battery can not be normal charge and discharge. If you are in such a situation, it is advisable to charge and discharge the MacBook at least once a month.

Turn off the device

There are many devices on MacBook laptops, such as optical drives, wireless, Bluetooth and so on. When we are using the battery, if you do not have Bluetooth or wireless, you can turn them off. Because some devices do not use them, they consume power.
For early MacBook notebooks with a CD-ROM drive, it is recommended that you remove the CD-ROM from your CD-ROM drive when using it.

Keep the system up-to-date

Apple at regular intervals on the Mac system will be upgraded, during which there are some updates on the power management optimization

How to watch the Golden Globes 2018 awards show？

Good news to anyone who prefers the Golden Globes to the Oscars but doesn’t have cable: NBC and the Hollywood Foreign Press Association have worked out a deal allowing the former to stream this year’s ceremony. When the broadcast begins at 5 p.m. PST, cord-cutters will have the option of watching via Sling TV, Playstation Vue, YouTube TV, DirecTV Now, or Hulu with live TV; those who actually have cable but aren’t inclined to watch the show on TV can tune in via NBC’s website or app.
Tonight’s Golden Globes may be more political than ever, thanks to everything that’s happening outside the awards race, and attendees using tonight’s celebration of film and television as an opportunity to acknowledge and amplify the #MeToo/#TimesUp movement that’s become a seismic force within the industry.
While the women may be wearing black on the red carpet, there are still statues to be handed out, with buzzy contenders like “Lady Bird,” “The Shape of Water,” “Get Out,” “The Handmaid’s Tale,” and “The Marvelous Mrs. Maisel” poised to take home some major prizes.

For this moment. Have you prepared a laptop to watch this awards show？Does your Dell laptop battery can last a long time watch this awards show？

when you watch the awards, you feel Very excited. But if your laptop battery show need to charge, you can not continue to watch the awards,that will be unbearable. So a good laptop battery is very important for us when we watch shows.

How to choose a Safe & Quality Dell Laptop Battery ?And how to find the battery with the longest life available for your Dell?

That's need a practical way to contrast them side by side. However, there is an important measurement of WHr(watt-hours) that determines the amount of laptop battery charging. The more WHr, the longer the battery will last between recharges. If your battery can produce one watt of power for 12 hours, then its rating is 12 WHr. Amp-Hours is another batteries' charging measurement. The difference between WHr and Amp-Hours is that the watt as a measurement of power and the Amp as a measure of current.The laptop battery provides a fixed voltage to your computer, measuring charge in watt-hours or amp-hours are equally valid methods. For instance, if your battery lasts for 20 watt-hours and always provides 10 volts, then it is valid to state your battery's energy storage capacity as 2 amp-hours. Modern laptop batteries tend to last three to five hours, depending on the power needs of the computer and the programs the user runs. Few things are as frustrating as when your laptop battery suddenly won't charge fully or stops holding its charge for as long; when this happens, you'll probably want to buy a replacement battery. www.acbattery.co.uk is your ideal choice.

Finding a Dell laptop battery may seem like an overwhelming task, especially if you have an older laptop model. You can easily find the Dell laptop battery you need, and get indispensable safety information as well.

Search the Dell laptop battery website. Fill out the search box on the website. If you know the battery name and type that you need, enter that information in the search box. Navigate the search results and add your selection to the shopping cart. If you do not know the exact battery you need for your laptop model, then locate your laptop on the website and add this to your shopping cart, even though you do not want to buy the entire laptop. This will start the customized building of your laptop system, so you can navigate the battery options available for your model. Decide which battery you want to buy. Perform another search in the search box for the battery you want. Select this item from the results page and add this to your shopping cart. Proceed to checkout.
Check with third party sellers before purchasing your battery. Computer stores sell various new and refurbished computer parts at deep discounts. Check online and retail stores that sell Dell products. Do not buy a Dell laptop compatible battery. Although battery manufacturers may suggest the laptop battery is Dell compatible, it may harm your laptop. Be sure that the third party seller offers only Dell laptop batteries.

Confirm the appropriate battery you need with a Dell customer service representative. Many third party sellers offer Dell laptop compatible batteries, but the sellers may unknowingly sell recalled laptop batteries. A recent recall on a Dell laptop battery was necessary when several laptops burst into flames. If you buy through a third party, confirm with Dell that this laptop battery has not been issued a recall.

Tips & Warnings

Dell uses vigorous testing and offers a warranty on all their laptop batteries. Consider buying directly through Dell to ensure you are buying a safe, quality battery.

Consider buying an extra laptop battery. A laptop uses 90% less energy than a desktop, and it uses less energy when running on batteries.

If you order from a third party seller, be sure the battery for the laptop has not been recalled.
Be sure there is an agreeable return policy and check for warranties before buying.

Before buying a new laptop battery, you also need to know the laptop battery Part Number, like:

Saturday, January 6, 2018

Apple to issue fix for iPhones, Macs at risk from 'Spectre' chip flaw

Jan 4 (Reuters) - Apple Inc will release a patch for the Safari web browser on its iPhones, iPads and Macs within days, it said on Thursday, after major chipmakers disclosed flaws that leave nearly every modern computing device vulnerable to hackers.
On Wednesday, Alphabet Inc’s Google and other security researchers disclosed two major chip flaws, one called Meltdown affecting only Intel Corp chips and one called Spectre affecting nearly all computer chips made in the last decade. The news sparked a sell-off in Intel’s stock as investors tried to gauge the costs to the chipmaker.
In a statement on its website, Apple said all Mac and iOS devices are affected by both Meltdown and Spectre. But the most recent operating system updates for Mac computers, Apple TVs, iPhones and iPads protect users against the Meltdown attack and do not slow down the devices, it added, and Meltdown does not affect the Apple Watch.
Macs and iOS devices are vulnerable to Spectre attacks through code that can run in web browsers. Apple said it would issue a patch to its Safari web browser for those devices “in the coming days.”

For the people who have Apple laptop.How to maintain your Apple laptop battery?

Here are some simple tips for Apple MacBook battery maintenance:

Screen brightness

When we use a MacBook laptop outside, due to the use of the battery, then you can properly adjust the screen brightness down. Because the screen is very power-hungry. If you lower the brightness, you can save power, let the laptop to use longer.
The function keys F1 and F2 on the keyboard adjust the brightness of the screen, and you can adjust it manually to make the brightness lower.
In the system default, the laptop automatically adjusts the screen brightness according to the ambient light, of course, we can also set it to manual mode. Open the "Monitor" option in System Preferences.
Then in the display settings, turn off the "automatically adjust the brightness" option.

Energy saving setting

Through the energy-saving Mac system settings, you can let the system automatically save a lot of energy consumption, such as how many minutes without use of computer, it will automatically turn off the screen.
In the system preferences, click on the "Energy Saver" option in the energy-saving settings for the battery window, you can set the screen off time, whether to turn off the hard drive, and automatically use the battery to dim the screen.

Operating temperature

Laptop Battery temperature is particularly sensitive, it has a relatively ideal operating temperature, once the temperature is too high will reduce the battery life. If the battery temperature exceeds 35 ° C, it will cause permanent damage to the battery, that is, to reduce the capacity of the battery, such as the original can hold 1 liters of water, and now can only be installed in half a liter of water.
Battery temperature overheating will be harmful to the battery, of course, the temperature is too low nor does it work. When the temperature you play 10 ° C, the available capacity of the battery will be reduced, that is, after a full charge, the use of time without the original length. However, the temperature is too low will not permanently damage the battery 10 million, as long as the temperature returned to normal, its capacity can be returned to normal.
So, if you are using a MacBook laptop when the ambient temperature is high, then it is recommended not to charge the Mac. Because the battery charging, the temperature will increase, coupled with the high ambient temperature, the battery temperature will be exceeded.

Regular charge and discharge

Apple MacBook notebook built-in lithium-ion polymer battery, we need to keep the battery inside it fluidity, so as to extend the battery life. If you are often on a business trip, you will often charge the MacBook, there is no problem. For example, you can use the battery when the company goes to work and use the power to charge it when you get home.
If you are always using at home, under normal circumstances we will plug the battery, so that you can not use the battery, resulting in the battery can not be normal charge and discharge. If you are in such a situation, it is advisable to charge and discharge the MacBook at least once a month.

Turn off the device

There are many devices on MacBook laptops, such as optical drives, wireless, Bluetooth and so on. When we are using the battery, if you do not have Bluetooth or wireless, you can turn them off. Because some devices do not use them, they consume power.
For early MacBook notebooks with a CD-ROM drive, it is recommended that you remove the CD-ROM from your CD-ROM drive when using it.

Keep the system up-to-date

Apple at regular intervals on the Mac system will be upgraded, during which there are some updates on the power management optimization

Friday, January 5, 2018

Intel says performance impact of security updates not significant

(Reuters) - Intel Corp (INTC.O) said fixes for security issues in its microchips would not slow down computers, rebuffing concerns that the flaws found in microprocessors would significantly reduce performance.

The performance impact of the recent security updates should not be significant and will be mitigated over time, Intel said late on Thursday, adding that Apple Inc (AAPL.O), Amazon.com Inc (AMZN.O), Google (GOOGL.O) and Microsoft Corp (MSFT.O) reported little to no performance impact from the security updates. intel

Intel shares fell nearly 2 percent on Thursday as investors were worried about the potential financial liability and reputational damage from the recently disclosed security issues.

The largest chipmaker confirmed earlier this week that the security issues reported by researchers in the company’s widely used microprocessors could allow hackers to steal sensitive information from computers, phones and other devices.

Intel Corp
46.7799
INTC.ONASDAQ
+0.62(+1.34%)
INTC.O
INTC.OAAPL.OAMZN.OGOOGL.OMSFT.O
Security researchers had disclosed two security flaws exposing vulnerability of nearly every modern computing device containing chips from Intel, Advanced Micro Devices Inc (AMD.O) and ARM Holdings.

The first, called Meltdown, affects Intel chips and lets hackers bypass the hardware barrier between applications run by users and the computer’s memory, potentially letting hackers read a computer’s memory and steal passwords. The second, called Spectre, affects chips from Intel, AMD and ARM and lets hackers potentially trick otherwise error-free applications into giving up secret information.

Intel had said the issues were not caused by a design flaw and asked users to download a patch and update their operating system.

Intel may be on the hook for costs stemming from lawsuits claiming that the patches would slow computers and effectively force consumers to buy new hardware, and big customers will likely seek compensation from Intel for any software or hardware fixes they make, security experts said.

The tips about how to check power adapter problem.

If we spent a few thousand dollars to buy a Lenovo laptop, but do not know what the reason that laptop strike, how to do? If it is possible to determine the initial power problems, you can more accurately determine the power through the following methods where the problem?

1. Check the Lenovo AC adapter indicator light, if the indicator light, generally think there is no problem from the power to the adapter, you must ensure that the light itself is not damaged.

2. Check whether the power adapter to the computer is power.This can be indicated by the notebook's indicator light, when the power is charged to the laptop, that charging indicator light will be bright, otherwise it will not light.or Find a same brand of power adapter exchange Try the same brand of power adapter with your power adapter laptop, if the other computer is working properly, then your power adapter is no problem otherwise your power adapter may have problems if the other side of the power adapter plugged into your computer, your computer Working well, but using your own power adapter does not work, then your power adapter has a problem.

3. Check the computer light changes. If you plug in the power adapter, you can see the charging light sometimes bright sometimes off, or always bright, it is the laptop inside the power adapter interface problems, the general may Inside the line is broken, the circuit board aging, welding drops and other reasons.This is called Weld phenomenon.This situation only called experts to repair.

Take my Lenovo laptop as an example. The indicator of the power adapter is normal, and when the power is plugged in, the computer can normally spend about an hour, and then it will be powered off automatically. It is observed that the indicator of the power adapter is on and the laptop can sometimes Charge to power, sometimes can not charge.
Considered from two aspects, first, there is a problem with the AC adapter contact, sometimes power, and sometimes can not. I borrowed a similar brand of AC adapter to try and found the same phenomenon, and my power is normal in other laptops So ruled out the problem of the AC adapter itself.Therefore, this is a problem of laptop.It was later found on the laptop charging indicator flashes off, and sometimes has not flash, causing the laptop due to not charging, the battery runs out and Automatically shut down. This flash off a note here laptop interface is not good, there may be broken. Later, sent to the Lenovo repair shop to check, it really is a problem with the laptop power interface.