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A few questions about laptops

post #1 of 14
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Hey, I just got my first laptop, which is an HP, and I have a few questions.
When the battery is full, should I keep it charging or should I unplug it and wait for the battery to get low and then charge it to full?
Also, is it better to keep it plugged in while playing games like WoW? because I notice that it gets hotter while playing games which is expected but I'm afraid it will get even hotter if it's plugged in.

Thanks!
post #2 of 14
When your battery is full and you leave it plugged in,you are decreasing it's life and you will have to buy a new battery in a few years.

As for leaving it plugged in to play wow,it should have no affect on it,becuase the heat is from the hardware of your laptop and not the battery.
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post #3 of 14
-I keep my HP plugged in 24/7 at 100%. It will not decrease the life of the battery as stated above. I have 2+ laptops in my house that are constantly plugged in for years and nothing has happened. I occasionally unplug it to move it, but not often. I have heard that if you let it discharge to 0% and charge it, it extends the battery life. This is just what I've heard, but don't quote me on it. Honestly, it doesn't matter if you have it plugged it or not.

-All laptops, especially ones like HP, Dell, Acer, and Toshiba get hot while gaming or doing CPU intensive tasks. It won't make any difference temperature wise if you plug it in.

The only difference between keeping it plugged in and keeping it unplugged is performance. There are performance settings in the control panel that change if the battery is plugged in or not.

These are usually the stock settings:
Unplugged - Power Saving mode (Better battery life)
Plugged in - Performance mode (Better graphics/performance)
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post #4 of 14
Quote:
Originally Posted by Evilsplashy View Post

-I keep my HP plugged in 24/7 at 100%. It will not decrease the life of the battery as stated above. I have 2+ laptops in my house that are constantly plugged in for years and nothing has happened. I occasionally unplug it to move it, but not often. I have heard that if you let it discharge to 0% and charge it, it extends the battery life. This is just what I've heard, but don't quote me on it. Honestly, it doesn't matter if you have it plugged it or not.
-All laptops, especially ones like HP, Dell, Acer, and Toshiba get hot while gaming or doing CPU intensive tasks. It won't make any difference temperature wise if you plug it in.
The only difference between keeping it plugged in and keeping it unplugged is performance. There are performance settings in the control panel that change if the battery is plugged in or not.
These are usually the stock settings:
Unplugged - Power Saving mode (Better battery life)
Plugged in - Performance mode (Better graphics/performance)

Keeping it plugged in or not, depends on your battery type. Try and find what type it is and google it. Older batteries usually needed to be depleted to 0% and then fully charged to get the most out of them. Current batteries do not need to be delpleted and could actually decrease your battery life if you drain it .

so find out what type of battery it is first.

Also your battery will not heat up, but your hardware will. Just make sure you have proper cooling techniques. thumb.gif
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post #5 of 14
Here's a thread dedicated to your exact questions about keeping the laptop plugged in or not.

http://www.overclock.net/t/1311637/removing-battery-when-on-ac-while-gaming
Quote:
Originally Posted by Evilsplashy View Post

-I keep my HP plugged in 24/7 at 100%. It will not decrease the life of the battery as stated above. I have 2+ laptops in my house that are constantly plugged in for years and nothing has happened.
Proof?

Keeping lithium-ion batteries (assuming your laptops' battery are) at 100% all the time dramatically decreases capacity.

And keeping your laptop plugged in 24/7 isn't going to cause it to explode or anything like that. It's just going to kill your battery much faster than usual.
Quote:
I occasionally unplug it to move it, but not often. I have heard that if you let it discharge to 0% and charge it, it extends the battery life. This is just what I've heard, but don't quote me on it. Honestly, it doesn't matter if you have it plugged it or not.
...Extend battery life? Really? How do you create something from nothing?
So much information about battery life in your post.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Edited by Bitech - 10/19/12 at 2:36am
post #6 of 14
I thought most laptops have a feature that prevents the battery from being overcharged? So if you have it plugged in whilst the battery is fully charged, it is fact not using the battery at all.

How would that cause damage?
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post #7 of 14
There's a lot of contradiction in this thread. I bought a laptop as well, surprisingly HP DV6 and i also had the same question. The thread is here. DO read it so that you get aware of what's going on when you leave your battery plugged in.

1. What i learnt from that thread is that, as long as your battery is not getting hot (stay cool, not at room temperature but cool), you are not doing any damage to the battery life at all and for that i bought a cooling fan which stays underneath when plugged in or gaming.

2. People saying that leaving the battery plugged in and fully charging it to 100% is harmful whereas i thought it's not, because Li ion batteries don't normally overcharge themselves and even if you take out the battery from the laptop OR just use the battery OR leave the battery plugged in, it gets discharged no matter what...but if it is in the laptop, it just gets charged again (i'm not an expert on how it works but what i think is that, if you have AC connected and the battery is fully charged, the charge will decrease and the AC will charge that again but once it is at 100% aka fully charged, the laptop will now get current from the AC directly, leaving the battery alone).

That said, i don't know if charging the laptop batteries frequently from 90-100% is harmful or not but do not let it get hot...

Correct me if i'm wrong...
post #8 of 14

Please back up any statements with sufficient proof, preferably with a link to your source of information. Misinformation about how to properly handle laptop batteries can be quite damaging. 

post #9 of 14
here is proof via request.

If your battery in Li-ion

3: Allow partial discharges and avoid full ones (usually)

Unlike NiCad batteries, lithium-ion batteries do not have a charge memory. That means deep-discharge cycles are not required. In fact, it’s better for the battery to use partial-discharge cycles.

There is one exception. Battery experts suggest that after 30 charges, you should allow lithium-ion batteries to almost completely discharge. Continuous partial discharges create a condition called digital memory, decreasing the accuracy of the device’s power gauge. So let the battery discharge to the cut-off point and then recharge. The power gauge will be recalibrated.

4: Avoid completely discharging lithium-ion batteries


If a lithium-ion battery is discharged below 2.5 volts per cell, a safety circuit built into the battery opens and the battery appears to be dead. The original charger will be of no use. Only battery analyzers with the boost function have a chance of recharging the battery.

Also, for safety reasons, do not recharge deeply discharged lithium-ion batteries if they have been stored in that condition for several months.

source: Techrepublic.com

Not to be confused with battery calibrating. see point 2 below

2. Battery Calibration –

There are some benefits to fully discharging your lithium battery periodically, for laptops this can be especially important. If you start to notice your battery meter becoming more and more inaccurate, it may be time for some battery calibration. Allow your lithium battery completely drain, then charge until the battery is full again. This will calibrate your battery giving you more accurate readings. This should be done once every 30 charges or when you notice battery readings are off.

3. Consequences of Heat –

Another enemy of lithium battery life is heat. If you were to leave your laptop plugged in and running for a year, you should expect the lithium battery capacity to be anywhere between 60% to 80% of it’s original max capacity. This is why people that use their laptops as desktop replacements will notice greatly reduced battery life performance after one year of use. This issue can be resolved by removing the battery while using a corded power source. Now you may want to check with your manufacturer ahead of time to check for safety concerns, some manufacturers have mentioned problems such as moisture and dust collecting in the battery casing.

source for these 2 thumb.gif

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post #10 of 14
I agree with all the statements except the last one partially. Heat does kill Li ion batteries but Laptops can be good desktop replacements IF, there's a big IF, If batteries are kept cool (i use laptop cooler for that) then your battery will be out of harm.
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