1 reason:
a. The laptop battery storage, use, life decay;
b. charging or not charging enough;
c. Ambient temperature is too low;
d. discharge efficiency is low, such as high current discharge a battery can not keep up due to internal diffusion rate of the reaction rate of material, resulting in a sharp drop in voltage electricity can not be released;
e. Over-discharge is protected.
2 measures:
a. laptop Inspiron 1545 battery during storage, to be charged and discharged once per month;
b. If not used long before the need to charge the battery;
c. In the normal use of the environment;
d. proper use of laptop Compaq presario cq50 batteries in the adaptation of the machine.
2012年1月29日星期日
The laptop battery cell
1 laptop battery there will be zero voltage or low voltage of reasons:
a. Battery zero voltage;
b. the Acer aspire 4745g battery from external short circuit or overcharge, anti-charge (force over-discharge);
c. Battery by continuous high-rate high-current overcharge, causing the battery very core inflation, short-circuit the positive direct contact.
(2) to prevent the laptop battery will be zero voltage or low voltage measures:
a. Check whether the battery voltage and current;
b. to avoid short-circuit;
c. avoid the collision cell, the weight;
d. HP Compaq business notebook 6910p battery voltage before recharging to off, then full charge needs to stop.
a. Battery zero voltage;
b. the Acer aspire 4745g battery from external short circuit or overcharge, anti-charge (force over-discharge);
c. Battery by continuous high-rate high-current overcharge, causing the battery very core inflation, short-circuit the positive direct contact.
(2) to prevent the laptop battery will be zero voltage or low voltage measures:
a. Check whether the battery voltage and current;
b. to avoid short-circuit;
c. avoid the collision cell, the weight;
d. HP Compaq business notebook 6910p battery voltage before recharging to off, then full charge needs to stop.
2012年1月4日星期三
How To Extend Your Battery Life
This is a very useful article. All of these things will help you prolong the life of your Dell inspiron n5010 battery. In addition, #2 is also a good idea because it prolong the life of your CPU. When you sit your laptop on a bed or carpet, the vents can get blocked. If this happens your CPU can overheat and that is much more expensive than a battery to replace.
Your laptop should shut off well before it gets hot enough to damage the CPU. The inspiron 6000 battery however will benefit from not being placed on carpets/couches/etc.
Some good basic tips in the article above.
However, much, much more useful info and just about everything you would ever need to know about all kinds of batteries here: [www.battery-store.co.uk]
However, much, much more useful info and just about everything you would ever need to know about all kinds of batteries here: [www.battery-store.co.uk]
Another tip for Cell phone users is to try and avoid unnecessary charges. If you're not heavy cell phone user you can safely go 2-3 days between charges.
I'm not sure about the inspiron 1545 laptop battery in 90 degree temperature claim. Core body temp is 98 degrees, radiating body heat stuck in clothes could make a pocket around up to 90+ degrees, especially during activity. Shouldn't that destroy my iPod and cell phone batteries by this rule?
One tip that is not true is the cold tip. Lithium Ion batteries are best stored in the cold. I recommend getting an extra li-on battery when you purchase a new laptop or cell phone, charging it up then running it down half-way and putting it in the freezer. By the time your original battery dies, you never know how old the replacement one you buy "new" is.
The wikipedia entry is a very good source of information on storing batteries.
Of interest, and not above:
The wikipedia entry is a very good source of information on storing batteries.
Of interest, and not above:
"If you don't plan on using your notebook for more than six months, Apple recommends that you remove and store the battery for dell inspiron 1525 with a 50% charge. If you store a battery when it's fully discharged, it could fall into a deep discharge state, which renders it incapable of holding any charge. Conversely, if you store it fully charged for an extended period of time, the battery may experience some loss of battery capacity, meaning it will have a shorter life."
I have a 3-year-old laptop which still has amazingly long compaq evo n400c battery life because I've maintained it properly.
I agree with all of them save the "don't leave them in a hot car". This may be true, but I live in South Texas and regularly leave my laptop in the car. Temps in the care can exceed 150 deg on a daily basis. My battery is just now starting to lose a bit of it's charge capacity two years later.
"Do not set your laptop on a bed, couch, pillow, or in some cases your lap. This will heat up the laptop due to poor ventilation and destroy the battery."
In other words, don't use it as a laptop? Take portege R835-P70 battery out and just use AC power, though if you accidentally pull the plug ......
In other words, don't use it as a laptop? Take portege R835-P70 battery out and just use AC power, though if you accidentally pull the plug ......
Most of these tips are great,but you should NOT deep cycle your lithium ion batteries (e.g. running it all the way out and charging it up again). This is proper for nickel metal hydride batteries,but not the type that are in most devices today.
@mconfoy: To resolve this, I use a large hardcover book to rest my laptop on. Then I put laptop + book on whatever surface I please. I have never actually read the book, but it is rather light for it's size and 11x17. I have named it "flat surface."
@f0nd004u: Almost every cellphone mfd and laptop battery states on the side of the packaging to full draw cycle it not only once, but TWICE a month (back to back) to keep the Dell Inspiron 1545 AC Adapter batterys life longest.
Also note: no matter how much care you treat your batteries, there's a limited number of recharge cycles allowed, which doesn't mean one should top it off less, in fact, topping it off doesn't hurt. If you don't top it off, you still get about the same number of hours of use before it's unusable. The rated number of charge cycles is more akin to the number of hours you can use it before the capacity drops to 80%, then you still get a good year's worth out of it, just at a lower capacity. However, manufacturers don't list it as rated hours of use because it depends on the drain, so they list the average number of charge cycles.
(ps. my hp laptop batteries would cost about 150 dollars to replace and that's when its modified to run for like 10 hours)
(ps. my hp laptop batteries would cost about 150 dollars to replace and that's when its modified to run for like 10 hours)
A related question for people: I'm trying to do the full discharge, reset calibration thing on my macbook battery, but the calibration is so off that it shuts down (not sleep, but turn off) when it thinks there's 40 minutes of charge left. Which seems to mean that the HP Compaq Business Notebook nw8240 battery doesn't recalibrate. Can anyone help?
Hello!
There is some good advice above, and some bad advice...
I wouldn't consider any portable/notebook computer to be a 'laptop' anymore. Have you seen a lithium battery ignition and/or explosion? If not, here's a similar piece of equipment: laptop welding torch. The world is full of tables, desks, and other flat surfaces -- use those.
It's a little-known, seldom mentioned fact that the number one cause of early cell phone battery failure is using a car charger. Many friends and family talk with me about their crappy cell phone battery life, and that's the first thing I ask them about. When they do have one, I tell them to not use it except for REAL emergencies; replace their current battery, and keep it charged with the A/C adapter. The 3 or 4 people I've asked about it later, have all said that I was right.
Last and least, Energizer Rechargeable batteries absolutely suck, IMHO. I'm a bit of a tree-hugger, but have succumbed to using Alkalines (that go to the drug store recycling bin when I'm done with them) for my digital camera, wireless mouse (gimme a recharging cradle, MS!!!), and wireless video game controllers. I take the batteries out of the Sony camera when not in use, as the camera seems to rapidly suck any batteries dry. The Logitech controllers and MS mouse absolute sip power, and are wonderful "Human Interface Devices".
Cheerio!
There is some good advice above, and some bad advice...
I wouldn't consider any portable/notebook computer to be a 'laptop' anymore. Have you seen a lithium battery ignition and/or explosion? If not, here's a similar piece of equipment: laptop welding torch. The world is full of tables, desks, and other flat surfaces -- use those.
It's a little-known, seldom mentioned fact that the number one cause of early cell phone battery failure is using a car charger. Many friends and family talk with me about their crappy cell phone battery life, and that's the first thing I ask them about. When they do have one, I tell them to not use it except for REAL emergencies; replace their current battery, and keep it charged with the A/C adapter. The 3 or 4 people I've asked about it later, have all said that I was right.
Last and least, Energizer Rechargeable batteries absolutely suck, IMHO. I'm a bit of a tree-hugger, but have succumbed to using Alkalines (that go to the drug store recycling bin when I'm done with them) for my digital camera, wireless mouse (gimme a recharging cradle, MS!!!), and wireless video game controllers. I take the batteries out of the Sony camera when not in use, as the camera seems to rapidly suck any batteries dry. The Logitech controllers and MS mouse absolute sip power, and are wonderful "Human Interface Devices".
Cheerio!
By the way, most people are not aware of the fact that the major drainage on their laptop's battery comes not from the CPU or hard drive, but actually from the display, especially if you're going widescreen above 15".
Many laptops go to maximum brightness when plugged in and may stay there when you unplug.
Learn to play with your brightness settings on the keyboard and adjust them to conditions. In a dark room, a minimal setting is enough.
And in emergency cases (e.g., on a plane), changing application background from white to black can save a little.
Many laptops go to maximum brightness when plugged in and may stay there when you unplug.
Learn to play with your brightness settings on the keyboard and adjust them to conditions. In a dark room, a minimal setting is enough.
And in emergency cases (e.g., on a plane), changing application background from white to black can save a little.
The displays found in most laptops contain a back light that is constantly on across the whole of the screen. When a voltage is applied to the screen elements they darken, thus setting your background or applications to a dark color may actually use up slightly more power (the difference is very small.)
High temperature kills batteries. Battery temp can be reduced (and life extended) by using an additional bay battery. Not only will you get almost twice the time (from two batteries) but the load on each will be much lower. They will stay cool and last longer.
High temperature kills batteries. Battery temp can be reduced (and life extended) by using an additional bay battery. Not only will you get almost twice the time (from two batteries) but the load on each will be much lower. They will stay cool and last longer.
I must confess, I've probably broken every single one of those rules with my laptop and I reckon I'm paying the price. I switched to Dell Inspiron 9300 AC Adapter battery power at 8:30 this morning and by 9:50 my laptop was telling me to switch back to mains power. When I first bought this machine I could count on a 3 hour charge while doing simple word processing, email, and web browsing.
db
@4dSwissCheese: Try booting to a command prompt and then letting it sit on until the battery drains all they way. It shouldn't have any power management software running if it doesn't get into Windows.
People for gods sake do NOT deep cycle Lithium ION unless you have no other choice. The technology is not meant to be deep cycled. If you want something to deep cycle get a DieHard.
One day in a hot car? 90 degrees?
Great, that's a normal day in Arizona, sometimes in an office building.
Great, that's a normal day in Arizona, sometimes in an office building.
In general I don't think deep cycling a XPS M1530 AC Adapter battery helps with modern laptops. Even manufacturers recommend against it. It was noticeably helpful back in the mid/late 90's, but not on a modern laptop.
It's generally considered FUD to do with LiIon... see this wikipedia entry.
Keep your battery cool is really the only practical thing you can do.
LiIon batteries start to die the day they are manufactured. Unlike NiCad's they loose life as they age, not based on usage. That's the price you pay for the technology. It's still better than it used to be.
It's generally considered FUD to do with LiIon... see this wikipedia entry.
Keep your battery cool is really the only practical thing you can do.
LiIon batteries start to die the day they are manufactured. Unlike NiCad's they loose life as they age, not based on usage. That's the price you pay for the technology. It's still better than it used to be.
Until OLEDs make their way economically into notebook computers, it seems reasonable to be redundant in one's power sources. Why not simply have an extra or two business notebook nx6310/ct battery packs in tow when traveling? Certainly the extra mass and volume are worth the extended operational time.
I love the fact that battery technology is improving so quickly, but it makes it very difficult for the average consumer to know exactly how to handle and maintain their batteries, and what they can realistically expect from them.
@Honus: it's not like a few hot days in a car, and then, *poof* dead battery for COMPAQ Presario R4000. It will lose capacity quicker, and in a hot climate, you're just not going to get as much time out of it. With NIMH and NICD, aging isn't much of a problem, as long as they get a little use. But, with LIon and LiPo (Lithium Ion needs an easier four-letter abbr!), it's always losing capacity.
Using it well, not overcharging, not deep discharging, not using high-current chargers (more for cell phones and iPods), not constantly exposing it to high temperatures and temp changes, etc., help keep the battery healthy. The battery will lose capacity, and will die. If you treat it poorly, it may happen within 2-3 years; treat it well, it and should last you 5 or more. In the case of cell phones, ditch crappy chargers that let you talk and charge at the same time, and carry a spare battery, instead.
Using it well, not overcharging, not deep discharging, not using high-current chargers (more for cell phones and iPods), not constantly exposing it to high temperatures and temp changes, etc., help keep the battery healthy. The battery will lose capacity, and will die. If you treat it poorly, it may happen within 2-3 years; treat it well, it and should last you 5 or more. In the case of cell phones, ditch crappy chargers that let you talk and charge at the same time, and carry a spare battery, instead.
theblackdog
@Cy Guy: She has a MACbook, kind of hard for her to boot into a command prompt when Windows doesn't exist on her computer :-P
There are some worthwhile tips on laptop ibm thinkpad r40 laptop battery life here (along with some other performance tweaks):
also, make sure you're using the proper charger - chances are if it's being sold in a dollar store or a gas station, you shouldn't be using it. the tip may fit, but many times these chargers don't meet the charging specs for the battery.
@TexasScout: I'll second your point. I live in the Mojave Desert. In the summer, we're lucky to get a day under 100 degrees. If spending all day in "90 degree +" temperatures killed your HP Compaq Business Notebook nw8440 Mobile Workstation battery, I'd go through them like popcorn.
dodonnell
@theblackdog: It's quite possible to boot a MacBook into a command line; after all, they run UNIX :) After the start-up chime, hold ⌘-S (Command-S) down until you see the UNIX boot sequence start to scroll across the screen.
See also: this article from Apple
See also: this article from Apple
Reply
xeijix
@Red_Eye: If people cared to learn how any lithium ion battery for Dell Studio 1737 monitor circuit worked, they'd know that you CANNOT deep cycle those batteries unless they discharge it to "0%" and leave it unused for a few months, which would definitely kill it. A COMPLETE discharge on the other hand, by letting the device drain the battery until the battery monitor circuit cuts it off, is perfectly fine. The circuit is made to PREVENT deep discharges, ie. it's IMPOSSIBLE for someone to choose the deep discharge, but not impossible to forget about the battery and as a result, it HAS deep discharged by itself.
xeijix
@Red_Eye: If people cared to learn how any lithium ion battery for Dell Studio 1737 monitor circuit worked, they'd know that you CANNOT deep cycle those batteries unless they discharge it to "0%" and leave it unused for a few months, which would definitely kill it. A COMPLETE discharge on the other hand, by letting the device drain the battery until the battery monitor circuit cuts it off, is perfectly fine. The circuit is made to PREVENT deep discharges, ie. it's IMPOSSIBLE for someone to choose the deep discharge, but not impossible to forget about the battery and as a result, it HAS deep discharged by itself.
@4DSWISSCHEESE: if the new macbook's still use a bios based battery monitor, you cannot discharge it to recalibrate, it's software based. I think the keyword to search for would be "PRAM", along with "macbook" and "battery". As i've said before, the old apple laptops used bios based battery for Dell XPS M1210 monitors, but if the new macbooks also use it, then there's a simple bios reset you can perform. If i remember, it's very specific, and the battery either has to be fully charged or discharged. Also, if i remember correctly, the calibration process is after the bio reset, so you'd have to fully charge and discharge the battery after the reset. (I think the bios reset process also does one full charge and discharge cycle to calibrate the electron counter chip/program)
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