Will leaving a laptop plugged in kill the battery?

hat · Oct 19, 2009, 06:55 AM

I have a laptop (Compaq/HP Pesario C500) and I am running WCG on it. The battery can drain quite quickly, so I would like to leave it plugged in so it can crunch while I'm not there to attend to it. I was wondering if leaving it plugged in would kill the battery? Deminish it's ability to hold a charge? Maybe even cause problems like fire like the sony batteries did?

Mussels · Oct 19, 2009, 07:10 AM

no. wont affect it.

RejZoR · Oct 19, 2009, 07:13 AM

It does affect it. Because it will constantly recharge it as soon as the charge falls a bit.
And every charge cycle slightly "damages" the battery. Because each has only limited number of recharge cycles. But i guess you'd have to run it this way for quite some time for it to wear out.

hat · Oct 19, 2009, 07:16 AM

Hmm.. is there any way I could set it up so that it runs off the battery until it hits ~10% or so, and then it charges?

kurosagi01 · Oct 19, 2009, 07:34 AM

Quote:

Originally Posted by hat

Hmm.. is there any way I could set it up so that it runs off the battery until it hits ~10% or so, and then it charges?

only way to not overcharge your battery is by removing it off the laptop,when its fully charge i would turn your laptop off and remove the battery that way you can reserve your battery if you ever take it out somewhere.
The laptop can keep running as long as you keep the power connector in the laptop

Wile E · Oct 19, 2009, 07:36 AM

Just remove the battery while plugged in.

Frick · Oct 19, 2009, 07:53 AM

New laptops are better at this, I think. I don't remember why that is though..

FordGT90Concept · Oct 19, 2009, 07:56 AM

It depends on the battery. Some batteries (lithium ion) aren't supposed to ever be fully drained (I think you want to keep it above 80%). Other batteries (Nickel-Cadmium I think) should be fully drained before recharging them. The laptop should have came with instructions for good battery maintenance.

RejZoR · Oct 19, 2009, 07:57 AM

Quote:

Originally Posted by kurosagi01

only way to not overcharge your battery is by removing it off the laptop,when its fully charge i would turn your laptop off and remove the battery that way you can reserve your battery if you ever take it out somewhere.
The laptop can keep running as long as you keep the power connector in the laptop

It's not recommended to fully charge Li-ion batteries for long term storage. Leave it at 25-50% and store it in cooler storage (but room temperature should be fine as well).

I keep my Aspire One running from the AC most of the time so i removed the battery to avoid unnecessary battery deterioration.

Mussels · Oct 19, 2009, 07:59 AM

Quote:

Originally Posted by RejZoR

It does affect it. Because it will constantly recharge it as soon as the charge falls a bit.
And every charge cycle slightly "damages" the battery. Because each has only limited number of recharge cycles. But i guess you'd have to run it this way for quite some time for it to wear out.

no it wont. the battery will be ignored, as the laptop draws power directly from the mains.

if its a Nimh battery, then this would be bad - if its Li Ion, then this is the best situation.

nimh batteries require to go fully discharged (flat) before recharging in order to maintain their best performance, while Li Ion batteries must never, ever go completely flat - so leaving it on the charger is actually better for modern batteries.

W1zzard · Oct 19, 2009, 08:02 AM

even with a li ion battery you should avoid constantly recharging it. my lenovo notebook comes with a software the will only recharge the battery if it drops a substantial percentage. but the best way is to remove the battery. when you connect the notebook to ac for a long time, just click out the battery but leave it in the slot so its available if you have to move.

Mussels · Oct 19, 2009, 08:04 AM

i'm going by what i learned in an electronics course, admittedly that was over 5 years ago.

battery tech DOES change (and you cant always trust what they say in books :P)

RejZoR · Oct 19, 2009, 08:34 AM

Every battery has a limited number of recharge cycles. Lead-acid accumulators are probably the least affected by this problem, while Ni-MH and Li-ion/Li-poly are more affected.
The problem is that even though laptop draws power from AC while battery is still inserted, charge falls over time by itself. Laptop detects the drop and charges it back to 100%. So it's constantly jumping back and forth between 99% and 100%. I wonder why it's not made to only re-charge it when it falls below 75% if plugged to AC. I mean to at least have option, even if it's not enabled by default.

vaiopup · Oct 19, 2009, 11:18 AM

In the past I left battery in my notebook and it was pretty much on 24/7, crunching.
After some time I went to run her off the battery and nothing......the battery wouldn't hold a charge anymore.

On present notebook I have removed the battery, which has the added plus of making the machine a tad lighter....is a 17" widescreen.

niko084 · Oct 19, 2009, 02:16 PM

It will lessen the life span, the notebook will run a bit warmer and the power supply stands a chance of burning out.

I have seen many friend charger boards on older dells due to people doing this and many dead chargers due to people using them plugged in with the battery in all the time, not to mention toasted batteries withing 6-12 months of new.

If it's plugged in for a long time, remove the battery or run it off the battery until it's dead and plug it in. Don't do both.

NiMH are the worst for this, Li-Ions are much better but still far from perfect.

EastCoasthandle · Oct 19, 2009, 02:29 PM

From what I recall it does depend on the battery however, overall you shouldn't keep it continuously charged. There are 2 types of batteries (if you are using lithium ion for example)
-batteries that keep memory
-batteries that are memory-free

Hopefully, yours is memory-free as it tends to last a bit longer through charging cycles. You are going to need to do a little research on which type you have. However, here is a link that can discuss the issue a little more. But again it's better to not continuously charge the battery.

[Ion] · Oct 19, 2009, 02:43 PM

I run my X31 almost 24/7 plugged in running WCG. When I'm going to be plugged in for long periods of time in one place I will sometimes remove the battery, but I still get over 3 hours of battery time (not running WCG, of course). I don't think there is much chance of damaging the power adapter, the X31 was designed for a 16V 3.5A adapter and I'm using a 16V 5.5A adapter (it's what I had), so there is plenty of margin for error here. And normally the laptop never uses more than 25w, so I think I'm find

Oct 19, 2009, 06:55 AM	#1
hat Maximum Overclocker Join Date: Nov 2006 Location: Ohio Posts: 12,236 (5.16/day) Thanks: 2,054 Thanked 2,039 Times in 1,549 Posts System Specs	Will leaving a laptop plugged in kill the battery? I have a laptop (Compaq/HP Pesario C500) and I am running WCG on it. The battery can drain quite quickly, so I would like to leave it plugged in so it can crunch while I'm not there to attend to it. I was wondering if leaving it plugged in would kill the battery? Deminish it's ability to hold a charge? Maybe even cause problems like fire like the sony batteries did? __________________ My Heatware “Inb4 smartphone LN2 overclocking.” -radrok

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Oct 19, 2009, 07:10 AM	#2
Mussels Doctor Moderator Join Date: Oct 2004 Location: Bendigo, Australia (NOT THE USA) Posts: 34,550 (10.97/day) Thanks: 3,699 Thanked 8,689 Times in 6,389 Posts System Specs	no. wont affect it. __________________ Edumacational thread about PC Audio My external HDD's.5x samsung 1TB + 2x Seagate 1.5TB = 8 TB external storage 32 Bit OS vs 64 bit OS information How to get hardware accelerated H264 playback (DXVA) Netbook Owners United!

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Oct 19, 2009, 07:13 AM	#3
RejZoR Join Date: Oct 2004 Location: Europe/Slovenia Posts: 3,963 (1.26/day) Thanks: 39 Thanked 752 Times in 540 Posts System Specs	It does affect it. Because it will constantly recharge it as soon as the charge falls a bit. And every charge cycle slightly "damages" the battery. Because each has only limited number of recharge cycles. But i guess you'd have to run it this way for quite some time for it to wear out. __________________ RejZoR's Little Secrets @ rejzor dot tk

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Oct 19, 2009, 07:16 AM	#4
hat Maximum Overclocker Join Date: Nov 2006 Location: Ohio Posts: 12,236 (5.16/day) Thanks: 2,054 Thanked 2,039 Times in 1,549 Posts System Specs	Hmm.. is there any way I could set it up so that it runs off the battery until it hits ~10% or so, and then it charges? __________________ My Heatware “Inb4 smartphone LN2 overclocking.” -radrok

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Oct 19, 2009, 07:36 AM	#6
Wile E Power User Join Date: Oct 2006 Location: Western PA (Pittsburgh suburbs) Posts: 18,129 (7.48/day) Thanks: 450 Thanked 3,825 Times in 3,123 Posts System Specs	Just remove the battery while plugged in. __________________ Visit Ashentech “What the hell did you expect? Leave Vista under the pillow and the OS fairy would make it Win7?” -El Fiendo “And Bring Mailman back god damnit, he is the Eric Cartman of TPU” -MRCL

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Oct 19, 2009, 07:53 AM	#7
Frick Fishfaced Nincompoop Join Date: Feb 2006 Location: Sweden Posts: 7,876 (2.98/day) Thanks: 1,076 Thanked 1,443 Times in 1,149 Posts System Specs	New laptops are better at this, I think. I don't remember why that is though.. __________________ Typemachine: Acer Aspire One D250 \| Atom N280 1.6 Ghz \| 1GB DDR2 \| 160GB SATA \| 10.1' 1024 x 600 \| Lubuntu 12.10 Oldbox: HP D530 \| Pentium 4 2.8 Ghz \| 1GB DDR \| 40GB \| Windows XP "The 'gentle biker' look is overdone. I'm going for 'psycho hillbilly.' "

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Oct 19, 2009, 07:56 AM	#8
FordGT90Concept "I go fast!1!11!1!" Join Date: Oct 2008 Location: IA, USA Posts: 10,574 (6.29/day) Thanks: 1,752 Thanked 2,596 Times in 1,960 Posts System Specs	It depends on the battery. Some batteries (lithium ion) aren't supposed to ever be fully drained (I think you want to keep it above 80%). Other batteries (Nickel-Cadmium I think) should be fully drained before recharging them. The laptop should have came with instructions for good battery maintenance. __________________ Golden Rule of Programming: Never assume. try { SteamDownload(); } catch (Steamception ex) { RageQuit(); }

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Oct 19, 2009, 08:02 AM	#11
W1zzard Benevolent Dictator Join Date: May 2004 Location: Stuttgart, Germany Posts: 13,763 (4.18/day) Thanks: 184 Thanked 10,209 Times in 3,157 Posts System Specs	even with a li ion battery you should avoid constantly recharging it. my lenovo notebook comes with a software the will only recharge the battery if it drops a substantial percentage. but the best way is to remove the battery. when you connect the notebook to ac for a long time, just click out the battery but leave it in the slot so its available if you have to move.

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Oct 19, 2009, 08:04 AM	#12
Mussels Doctor Moderator Join Date: Oct 2004 Location: Bendigo, Australia (NOT THE USA) Posts: 34,550 (10.97/day) Thanks: 3,699 Thanked 8,689 Times in 6,389 Posts System Specs	i'm going by what i learned in an electronics course, admittedly that was over 5 years ago. battery tech DOES change (and you cant always trust what they say in books :P) __________________ Edumacational thread about PC Audio My external HDD's.5x samsung 1TB + 2x Seagate 1.5TB = 8 TB external storage 32 Bit OS vs 64 bit OS information How to get hardware accelerated H264 playback (DXVA) Netbook Owners United!

Oct 19, 2009, 08:34 AM	#13
RejZoR Join Date: Oct 2004 Location: Europe/Slovenia Posts: 3,963 (1.26/day) Thanks: 39 Thanked 752 Times in 540 Posts System Specs	Every battery has a limited number of recharge cycles. Lead-acid accumulators are probably the least affected by this problem, while Ni-MH and Li-ion/Li-poly are more affected. The problem is that even though laptop draws power from AC while battery is still inserted, charge falls over time by itself. Laptop detects the drop and charges it back to 100%. So it's constantly jumping back and forth between 99% and 100%. I wonder why it's not made to only re-charge it when it falls below 75% if plugged to AC. I mean to at least have option, even if it's not enabled by default. __________________ RejZoR's Little Secrets @ rejzor dot tk

Oct 19, 2009, 11:18 AM	#14
vaiopup Join Date: Feb 2008 Location: England Posts: 774 (0.40/day) Thanks: 11 Thanked 192 Times in 120 Posts System Specs	In the past I left battery in my notebook and it was pretty much on 24/7, crunching. After some time I went to run her off the battery and nothing......the battery wouldn't hold a charge anymore. On present notebook I have removed the battery, which has the added plus of making the machine a tad lighter....is a 17" widescreen. __________________ I came, I crunched, I saw something shiny and left 60 threads heating the house and spinning the meter. Crunching FOR Stan, not as Stan........Simplez innit. EOD sucks.

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Oct 19, 2009, 02:16 PM	#15
niko084 Eligible for custom title Join Date: Dec 2006 Location: Saint Paul, Minnesota Posts: 6,387 (2.71/day) Thanks: 190 Thanked 739 Times in 599 Posts System Specs	It will lessen the life span, the notebook will run a bit warmer and the power supply stands a chance of burning out. I have seen many friend charger boards on older dells due to people doing this and many dead chargers due to people using them plugged in with the battery in all the time, not to mention toasted batteries withing 6-12 months of new. If it's plugged in for a long time, remove the battery or run it off the battery until it's dead and plug it in. Don't do both. NiMH are the worst for this, Li-Ions are much better but still far from perfect. __________________ This electronic post is encrypted in the 'English language method', any attempt to decipher meaning from these symbols is a violation of the Digital Millennium Copyright Act of 1998. This includes, but is not limited to: interpreting the symbols through use of biological, visual decryption devices, translating the symbols into another language encryption scheme, and digital processing the symbols into a form conducive to oral interpretation. HWBOT HEATWARE

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Oct 19, 2009, 02:29 PM	#16
EastCoasthandle Eligible for custom title Join Date: Apr 2005 Posts: 6,244 (2.12/day) Thanks: 382 Thanked 1,526 Times in 865 Posts System Specs	From what I recall it does depend on the battery however, overall you shouldn't keep it continuously charged. There are 2 types of batteries (if you are using lithium ion for example) -batteries that keep memory -batteries that are memory-free Hopefully, yours is memory-free as it tends to last a bit longer through charging cycles. You are going to need to do a little research on which type you have. However, here is a link that can discuss the issue a little more. But again it's better to not continuously charge the battery. __________________ Windows 7 Club!, Online Gaming Lag and You GPU/CPU Water Cooling Club, Q9650 OC'd vs 2600K Stock PC Air Cooling Club, Game Performance Tips

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Oct 19, 2009, 02:43 PM	#17
[Ion] WCG Team Assistant Join Date: Sep 2009 Location: North Carolina, US Posts: 10,656 (7.93/day) Thanks: 8,241 Thanked 9,319 Times in 4,259 Posts System Specs	I run my X31 almost 24/7 plugged in running WCG. When I'm going to be plugged in for long periods of time in one place I will sometimes remove the battery, but I still get over 3 hours of battery time (not running WCG, of course). I don't think there is much chance of damaging the power adapter, the X31 was designed for a 16V 3.5A adapter and I'm using a 16V 5.5A adapter (it's what I had), so there is plenty of margin for error here. And normally the laptop never uses more than 25w, so I think I'm find __________________ Ion's WCG Essentials Thread Crunching (64 Threads + 896 CUDA Cores + 6272 Shaders): i3-2100@ 3.1 + HD7850 -- Atom D510 @ 1.66 -- C2D-M T9600 @ 2.8 -- i7-3612QM @ 2.8 -- i7-860 @ 2.9 + HD7950 -- i7-2700k @ 4.4 + 2xGTX470 -- PentDC-M T4200 @ 2.0 -- i7-920 @ 3.83 + 3xHD7770 -- DP Xeon E5420 @ 2.5 + HD7930 -- E1600 @ 2.4

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