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Can A Laptop Be Overcharged?

My laptop is normally plugged into power supply all day. My fear is that it may overcharge and the battery may damage, so I sometimes unplug it from the power supply. Please what's your take on this.

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@kosovo, I am using a fujitsu life book v700 series. Its cofig are 2ghertz processor, 2gig ram 32 bit and windows vista premium. Will these info be enough.

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This is it. Lap. battery can be overcharged and can't. it can if you leave plugged in and not using it, simple.and it can't if it is in use,

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^^^^

it can be overcharged. .

@yahoo! , what PC do you use?

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Lappy batery can never be over charged .

mine is an example, under 24/7 hours power supply and always plugged.

no wahala

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@kosovo i would love to have that software o!

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First it’s important to understand what overcharging is:

Over-charging occurs when the charger keeps the battery at a temperature that is warm to touch (body temperature) while in ready condition.

Li-Ion laptop batteries have built-in controller chips which prevent it from overcharging, as they can explode if overcharged. Overcharging does not affect the life span other than potentially destroying the battery.

A lithium-based battery should never be allowed to get warm in a charger. If you have this happen, the battery is no good or the charger is not working properly. Don’t continue to use the battery or charger if this happens.

A Lithium-ion battery may be damaged by extensive overcharging (continuously on a charger for more than 24 hours). Damage to the battery from overcharging would only occur in the very unlikely event of a malfunction of the charging system

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right according to mine manufacurers (toshiba win 7 satellite) you cannot overcharge the battery as it has a measure to stop the power as soon as it is fully charged.

As long as it is not on charge for a week constantly, it cannot be damaged.

It will be degraded with time though until a point where it will no longer hold its charge so it is advisable to switch off when fully charged.

But if you are doing any major thing, like backing up files, downloading films , watching football/ movies e.tc, always keep it plugged in.

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well it depend on the type of laptop.it is however saver to unplug it when not in use and it is fully charge because of current flunctuation.

You need to protect your battery, because there are a lot of fake batteries at otigba that may not last.

thanks

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thanks for the update.

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Its not possible to overcharge your laptop, But it is advisable for u to disconnect ur laptop when fully charged and not in use, It is also advisable for u not to charge your laptop wit a generator, You do this n ur laptop batt wil have a long life span, Cheers!

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In most things you want to do with the laptop, you need it in the AC plug anyway, whether it is fully charged or not.

My handbook for my toshiba advises the computer to be always plugged in , if i am watching films, downlading, or backing up any files, whether the charge on battery is 100% or not.

The battery is only good for just nomal surfing and light computer work.

Modern laptops are totally different from old ones ( just got one this week) and it has nothing about overcharging or not.

But then i will email the manufacturers just to see the response and i shall post up the reply here.

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Many generators are not good to be used on electronic Systems as they produce what some people call 'dirty current'. In other words, the output voltage produced by these generators have a very poor 'sine wave' and this is not good for electronics.

I wouldnt suggest you keep powering your laptop from your generator unless if otherwise suggested by the maker of the generator.

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My laptop is an Advent 7109A model. The battery is dead as it does not last for up to 15 mins without electricity. Wher can I get a new one to buy. Someone please help.

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Pls my question is this, does a small gen e.g the tiger known as i pass my neighbour, affects laptop. whenever i use my lappy in the office i dont have any problem until i get home to use it with the generator,

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Pls my question is this, does a small gen e.g the tiger known as i pass my neighbour, affects laptop. whenever i use my lappy in the office i dont have any problem until i get home to use it with the generator,

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@ wallie, thanks for your input. . .should have been more specific about the batteries i was talking about.  Peace!

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Tamedo is right but only to the extent that it applies to nickel-based batteries due to memory contained therein. Look up “memory effect” or “lazy battery effect.” With regards to newer laptops with lithium-based batteries, Tamedo is wrong.

Lithium-based batteries, like the ones used in newer laptops, do not contain any memory and as a result should be charged more frequently rather than being deep-discharged. Reducing heat to the battery should be the primary concern and not the actual charging/discharging cycle.

Also, due to the fact that lithium-based batteries are inherently unsafe, it is mandated that they include safety features before being sold commercially. One of the safety features is a “thermal interrupt” that protects against overcharging and overcurrent.

In other words, you cannot literally overcharge a lithium-based battery but keeping it plugged-in will generate heat which will have an adverse effect on the longevity of the battery.

Bottom-line: DO NOT keep your newer (lithium-based battery) laptop permanently plugged in.

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Lithium ion (Lion) Batteries which is the type used by almost all laptops and cell phones have internal circuits that cut-off the battery when fully charged(prevent overcharging) and shut the battery down when it reaches a critical low(Prevent damages that could permently damage the battery from over discharging).

Hot enviroment though gradually shorten the life of batteries-your computer is such enviroment.

Ideally, Refrigerator is a perfect place to store batteries. Remember to charge before storage as leaving your battery 4 a very long time when not charged can permenantly damage the battery, due to inevitable gradual discharge(the internal circuit cannot prevent discharging beyond critical low during storage).

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Tamedo is right.

nlanders have to differentiate btw what 'you do' and 'the right thing to do'

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@ all, the easiest way to get a good life cycle on your battery is to calibrate it the moment you purchased the notebook.

charge it completely till it's completely charged and let it discharge to 0% (yes, 0%) and then charge it again. . .repeat the process about three times. 

Peace!

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@ bluediva,  you're doing your battery more harm than good by doing the remarks in bold.

on the contrary, you want to let the battery completely discharge to like 3% - 5% before charging. 

your battery will last longer that way. 

@ OP, yes, your notebook battery can be overcharged. . .once the battery meter reaches 100% then your battery is fully charged. 

any further charge, reduces the life cycle of your battery.  on a side note, it's a good idea to calibrate your battery every three months.

though some manufacturers bundle utilities (usual in BIOS) used in calibrating laptop batteries with their notebook brand but the simplest way to do that is to let it completely discharge to 0% after a complete charge (100%) before you charge it again.

just make sure you have any documents you're working on at the time saved by the time it gets to like 8%. 

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Unequivocal, YES!!!! You can overcharge a battery and damage it. e. The battery to my laptop.

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but me I no dey do so,

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i think you have it the other way around. the plug in the wall is AC while the battery is DC

The battery would not overcharge, not in modern laptops anyway. when you connect it to the wall. AC it charges the battery and when the battery is full, it keeps using the AC as normal without using the battery, just like your TV or any other  appliance.

When you unplug it form the wall, it switches to battery DC and starts using that.

If you plug it all the time, when it charges the battery fully, it would just revert to AC status like leaving you desktop PC on all the time.

However it is advisable to unplug it when it is fully charged, as many batteries would wear down with time as a result of charging and recharging.

it also depends on the battery type. I think the lithium ones have fail safes to ensure these do not happen.

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one sure way to shorten the lifespan of your laptop battery is to have it plugged in all the time.

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From the little knowledge I have, there is no way your lap top battery can be over charged unless if there is a design fault from the manufacturer or a fault develops in the internal circuitry of your battery packs.

The manufacturer must have thought of that during design and would,nt like to set houses or people on fire.

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that is the bitter thruth

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u shouldn't always leave ur charger in ur laptop because it heats up d battery when its full causing reduction in battery power.

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Yes it will affect d battery one day. u will need it pluged b4 u use it

SHALOM

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@Princek12 i second u, a simple search will echo a true answer as Nairaland posters are dumb and their moderators suck!!!.

The truth of the matter is that the term overcharge is not true, as far as there is light, you can keep using it plugged in, and if n light, you have been given the priviledge of usage for some hours, it was clearly written in my lappy manual that laptop should be plugged on light, when electricity power is avaiilable, are they as dumb as all u posters!!!!

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People are mixing things up here. I know that when the battery is full, it will automatically switch to AC supply when it is still powered ON. I am talking of a situation whereby your battery is fully charged and it is still connected to the AC source and the unit is OFF pherhaps all day long or even longer.

Just as we get conflicting and different replies here so also it is when you search about the topic on Google and the likes. Pherhaps you will do the reserch on it and give us the result here. Nobody is begging to have his thread on the front page. If the moderator see that it is beneficial to a lot of people, he does it at his own discretion. If you have anything with the moderator, you can open another thread for that and see if it gets to the front page.

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@OP

If you google your question, you'd get much more answers than you actually can cope with

Just Google it

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i don't think batteries overcharge.

like ppl already said, unless you are using a really old/ outdated laptop, then u have no problem.

this post answers it best.

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I kept scrolling down when i saw the original post, and finally lctewand hit the nail on the head.

You cant keep your battery plugged 24/7 thats suicide.

If you're sure of power 24/7 then maybe you dont even need your battery, just pull out the damn thing.

Its a fact that frequent charge and discharge cycles impact negatively on the battery.

Also, bluediva

I'd advice that you let your battery reach its critical level before you recharge it. Charging at 70 percent will ruin your battery

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Lol! LoL! Or desktop. There is one I have like that and its so frustrating cuz its the internet gateway.

I've been using my laptop for one year now, virtually plugged in 24/7 and my battery hasn't depreciated.

I guess in Naija, PHCN helps extend your battery life by preventing overcharging (i.e. if charge is inversely proportional to battery life).

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YES YES YES

A LAPTOP CAN BE OVERCHARGED,

presently my laptop is called a television by every1 who uses it,

any time nepa takes the electricity my laptop just goes off cos my batterys spoilt

durin summer in august my laptop waz permantly charged as in 24/7 nd there was constant electricity where i waz, so i was really not bothered  to unplug it,

but by the time i got back home,  i discovered dat my battery power was lower, 

the battery that normally works 4 2 hours started working 4 only 20 minutes  and by september my battery jst finally stoped working

my laptop just became 1 year old,  i don't think its that old,

@ poster pls pls pls i beg u always unplug ur charger when ur laptop is fully charged,  its really frustrating to have a bad battery,

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I use dell inspiron B130 and It has an automatic cut out from charging as soon as the battery is 100%.

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How can I get new and good battery for my GATEWAY LAPTOP.

Thank you.

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How to prolong lithium-based batteries

Avoid frequent full discharges because this puts additional strain on the battery. Several partial discharges with frequent recharges are better for lithium-ion than one deep one. Recharging a partially charged lithium-ion does not cause harm because there is no memory. (In this respect, lithium-ion differs from nickel-based batteries.) Short battery life in a laptop is mainly cause by heat rather than charge / discharge patterns.

Batteries with fuel gauge (laptops) should be calibrated by applying a deliberate full discharge once every 30 charges. Running the pack down in the equipment does this. If ignored, the fuel gauge will become increasingly less accurate and in some cases cut off the device prematurely.

Keep the lithium-ion battery cool. Avoid a hot car. For prolonged storage, keep the battery at a 40% charge level.

Consider removing the battery from a laptop when running on fixed power. (Some laptop manufacturers are concerned about dust and moisture accumulating inside the battery casing.)

Avoid purchasing spare lithium-ion batteries for later use. Observe manufacturing dates. Do not buy old stock, even if sold at clearance prices.

If you have a spare lithium-ion battery, use one to the fullest and keep the other cool by placing it in the refrigerator. Do not freeze the battery. For best results, store the battery at 40% state-of-charge.

http://www.batteryuniversity.com/parttwo-34.htm

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most pple believe this trash. to tell u the truth, once the laptop is connected to Direct power source(DC), it will automatically switch to that source while charging the battery. it will remain charged until the power pack is removed from the socket, when the system is automatically switched to the battery(AC). dats why one can still use the laptop even if the battery is no longer working - just connect it to the light source. My laptop's battery is so dead now and i still use it with the electricity socket.

Look at it this way -  when u charge the battery of your cell fone, there will come a time when the fone will say "battery fully charged" right? it is the same concept.

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May be it is me, but how in the world did this topic make front page? A simple google search or wiki search or an inquiry on a nerd website would have answered this question beyond any doubt. It appears the moderators favor stories that are posted by their cohorts rather than selecting topics for front page based on merit and popular demand. A front page topic could at the very least be a topic that cannot be answered by a posting on wikipedia or a google search or a nerd website. Na waa oooooooooo

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I usually let mine get to 98 - 100% before unplugging.

I then use it till about 70 something % before replugging.

Trying to be on the safe side in case overcharging ain't good for it.

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Overcharge how? Current/voltage overflow?

Why don't you get a surge protector.

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Yes the laptop computer can be overcharged in the sense that if you are not using the laptop computer always endeavour to check if the battery is already full. Yes, if full plugging it to power for charging without using it is an act of overchaging the cells of the laptop computer.

www.mylaptopsolutions.blogspot.com

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if you keep your laptop constantly charging it can damage the battery (in old laptops). New batteries have a fail safe that cuts off the electrical charge when the battery is fully charged.

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Allowing your laptop battery to completely drain out for battery longetivity depends on d type of battery your laptop is using. I knw we hv two types of laptop battery and mine does'nt suport completely draining of it.

Google and read more abt laptop battery coz u might think your doing your battery good where as your killing it more and more.

Li-ON battery does'nt support complete discharge.

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At one time, I hardwired the power pack of my old Toshiba Satellite to the board (cutting off the connector and soldering the wire to the board).

As long as their is electricity its on power. Where I am we get public electricity for about 20 hours a day (plus minus). The laptop's battery is still very okay, i discharge it frequently and it stays for about 2.5 hours.

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I personally have not hard of laptop battery being over-charge. But what I will recommend you do to your laptop battery is to make sure that you allow the battery to completely drain at least once in every one month to prolong the life of your battery.

But as for it being over-charge, I have not hard of such from a fellow techie.

Good luck.

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