All Questions
Tagged with power-supply laptop
430
questions
238
votes
6
answers
207k
views
Should laptops remain plugged in when their battery is 100% charged?
When your laptop's battery is 100% charged, should you leave it plugged in so any battery power doesn't get used, or will that cause overcharging, overheating, etc.? Should the laptop be unplugged ...
- 4,220
99
votes
5
answers
101k
views
Why are my games slower on battery power, even with the power plan set to High Performance?
My laptop is capable of running most games on high settings at decent frame rates. However, if the power cable gets unplugged while I'm playing, the game immediately starts slowing down, even if I'm ...
- 1,755
61
votes
11
answers
214k
views
Laptop power supplies, does current matter?
I have two laptops (same manufacture), with the same type of power connector.
However, the power supplies/transformers are slightly different.
The output on the first laptop's power supply is 15.6&...
- 1,574
26
votes
4
answers
108k
views
Laptop touchpad works incorrectly when on power supply
My original laptop adapter broke down, so I've bought a new one. It's a no-brand adapter from a Dutch internet shop.
The power of the new adapter is slightly more than the old adapter, but in my ...
- 1,196
19
votes
5
answers
54k
views
Stop Dell from throttling CPU with power adapter
My Dell laptop is experiencing the old problem of the power adapter failing to be recognized by the computer. I know for a fact it is just a break in the data cable in the line, because if I position ...
- 698
19
votes
3
answers
74k
views
What is typical power consumption of 2.5" laptop external hard drive connected to USB socket?
What is the approximate power and current consumption of a 2.5" laptop external Hard Drive 7200RPM SATA (300Gb), connected to a laptop USB port as an external hard drive?
I've heard that using a ...
- 409
15
votes
3
answers
18k
views
Notebook's Battery is not calibrated. Operates at 0% for an hour
My problem is that even if the battery percentage is 0 the notebook can stay on around an hour.
I have disabled "critical battery action" on my operating systems to use more time my notebook.
The ...
- 251
14
votes
5
answers
16k
views
Ungrounded laptop (Macbook Pro) buzzes in headphones, weird feeling when fingers brush lightly
I've got a nearly 3-year-old MacBook Pro 15" 2.16GHz (MacBookPro2,2). When I am not using the extended, grounded adapter for the power supply, just using the simple, two-prong plug, I can hear a ...
- 1,026
13
votes
11
answers
16k
views
Will leaving the laptop power brick connected to the power socket be dangerous?
My co-workers (who worked with the company longer than I have) loves to remove their laptop's power cord when they need to move around the office.
I frown on this practice since they usually don't ...
- 777
12
votes
3
answers
96k
views
Laptop battery: is voltage really important to respect?
I got an Acer Aspire 5100 and I just bought a new battery (after the stock battery just died yesterday). But I saw something after buying and I'm wondering whether it's really important or not.
My ...
- 1,713
12
votes
9
answers
49k
views
How can I cool down a laptop power supply?
Yes, that's right. A laptop power supply.
This afternoon I was playing Minecraft on my ASUS laptop. As many Minecraft players know the game is written in Java which, on high settings, can force quite ...
- 6,706
12
votes
6
answers
39k
views
Can you plug-in the battery while laptop is on AC only?
I'm using my laptop at home with battery removed and only connected to the AC power. However I'm lacking the mobility as my power cord is kinda short. Is it safe from electrical point of view to plug ...
- 1,709
11
votes
2
answers
9k
views
What happens when laptops reach 100% charge?
I have been reading alot of mixed views on how Lithium Ion batteries work when it comes to laptops. I have the new dell xps 15, with an intel i7 cpu, 16gb ram, and a 512gb ssd.
Is it bad for the ...
- 329
11
votes
1
answer
99k
views
How to judge if a laptop charger noise is a safe "hum" or a dangerous "crackle"?
I've read existing questions and answers on noises coming from laptop chargers (e.g. https://superuser.com/a/104860/112639 and https://superuser.com/a/832501/112639 and have learnt that there are two ...
- 5,396
11
votes
3
answers
28k
views
Does a laptop computer charge faster when off?
A laptop power supply can supply a limited amount of power. Conceivably, then, when the computer is running, some of the power must be diverted to the processor and other components, leaving less to ...
- 7,763
10
votes
3
answers
7k
views
(Why) are IEC C5/C6 connectors a necessity? Why not use C13/C14?
That's a question I was asking myself the first time I saw such a weird C5 plug. That was a while ago, but I came across it again and haven't found an answer yet.
The only thing I could find out is ...
Mike
9
votes
4
answers
29k
views
Why is the laptop charger thing (transformer) making a noise? [duplicate]
The laptop power cable consists of two cables with a transformer in the middle. The transformer is making a tiny noise while plugged in. I think it's normal... is it normal? What is it exactly?
- 40k
9
votes
2
answers
3k
views
Is it safe to replace a 11.25V laptop battery with 11.1V or 10.8V?
I need a replacement battery for an older laptop that originally came with an 11.25V Li-ion battery (presumably 3 cells at 3.75V each).
The batteries I found online mostly have a nominal voltage of 11....
- 161
8
votes
5
answers
85k
views
Charge a laptop via USB power (500mA)? [closed]
My laptop is almost dead and I do not have the charger. Is there anyway I can DIY a charger for a laptop. Even if it takes 20 hours. To make it clear, I want to send power from a usb port on another ...
- 1,844
8
votes
6
answers
26k
views
Charging a laptop though a USB-C power port with a low voltage/amperage
Let's say we have a new laptop with a USB-C port - like the new Macbook1 or the Chromebook pixel which, yes, are meant to be charged through these ports -, a good solar panel for smartphones (5V 3A ...
- 1,401
8
votes
1
answer
183
views
Laptop power options while flying [closed]
I have noticed some laptop power supplies include a plug that allows you to connect it to a power source while flying. If I was going to go out and buy a laptop power supply for this purpose, which ...
- 7,926
7
votes
6
answers
65k
views
Connect a 2.5" (laptop hard disk) SATA hard disk to Desktop PC
Can I connect a laptop SATA hard disk to Desktop PC? Do I have to use some adapters or I can just plug in SATA power connector and SATA data cable like my Desktop hard disk is connected?
I noticed ...
- 89
7
votes
6
answers
45k
views
Can I use different power supply on my laptop?
Battery on my laptop is 4%, I don't have original power supply at the moment and I have some work to do.
Is it safe to ask a friend to give me his power supply from another type of laptop?
What ...
- 191
7
votes
3
answers
61k
views
My laptop has a three prong grounded plug. Does it need the ground pin?
I recently bought a minivan that has 110V power outlets. I'd like to use my laptop in the van sometimes (not as the driver, of course), but my laptop has a three prong grounded plug, and the outlet is ...
- 1,223
6
votes
3
answers
15k
views
Is it safe to use a power supply with a different laptop? [duplicate]
Possible Duplicate:
charging laptop with a diffrent manufacture charger
I have a Dell Vostro 1500 laptop, but unfortunately I lost the power supply in Indianapolis last month. I have a power ...
- 982
6
votes
4
answers
11k
views
Dell laptop power cable always falls out!
I have a Dell Inspiron 1720 laptop, about 18 months old.
The problem is that the power cable keeps on falling out.
It's just sitting on a desk, but minor movement can cause it to come out.
From a ...
- 303
6
votes
5
answers
26k
views
How do I protect my laptop from power surges?
I recently bought a laptop. While connecting it to the AC mains for charging it up for the first time, I wondered what would happen if a power surge occurred while my laptop was connected to the AC ...
6
votes
3
answers
744
views
Are universal power supplies for laptops worth it?
My laptop's cable broke and sadly it seems like I need to buy a new power supply.
What I wonder is, I've found that universal power supplies are much cheaper than the official HP ones. Are they ...
- 215
6
votes
3
answers
4k
views
Can a 20V 4.51A power supply be used with a computer that requires a 19V 3.42A power supply? [duplicate]
I have a laptop that says it needs a 19V 3.42A power supply. I have a Dell 20V 4.51A power supply.
Can I use this power supply with my laptop, or will it destroy the machine?
- 61
5
votes
4
answers
54k
views
What is the function/purpose of the pinhole on the battery of a Samsung Series 5 ultrabook?
Some background (not entirely relevent to main question): I can't find my specific model of laptop online but it has all the same specs as this excluding the touchscreen: http://bit.ly/18netZQ
It's a ...
- 153
5
votes
2
answers
13k
views
Why is the battery dead inspite of the full charge the previous day?
My laptop is 9 months old. In which I sparsely use the battery of the laptop as I am connected to the power outlet most of the time. This problem has started since 4 days. As per this post my system ...
- 551
5
votes
1
answer
1k
views
What could be the name of this rare type of HP Pavilion power connectors?
It is a HP Pavilion G6 laptop, and I am trying to identify its uncommon power plug. Looking around on the net, I see only the more standard, center pin power plugs, but not this. I think, maybe most ...
- 2,645
5
votes
2
answers
766
views
AC not working properly
Yesterday evening i used my laptop without any issue, this morning i went to work and i have noticed that the AC charger is not working properly. This is the behavior:
If i connect the laptop to ...
- 228
5
votes
3
answers
2k
views
Asus laptop X50R not starting when pressing power button
I have an Asus Notebook (x50R model). Is a really old laptop with like 10 years
I have a problem I can't understand:
If I press the power button it doesn't start
If I unplug the power and remove and ...
- 51
5
votes
1
answer
11k
views
Is it ok to remove a laptop battery while the laptop is running on AC power? [duplicate]
Possible Duplicate:
Are notebook batteries generally hot-swappable?
I have a charged laptop battery in a laptop that is running on AC power and charging the battery. Would it damage the battery ...
- 403
5
votes
2
answers
1k
views
How to learn the maximum power usage of my laptop
Other people already asked this question, and were referred to internet tools to calculate maximum power usage, but I don't know how to get the information it wanted. For example, it wanted to know ...
- 53
4
votes
5
answers
15k
views
Dell Inspiron 6400 indicates the wrong power adapter is plugged in and will not charge the battery
I am using the original power adapter with the Dell Inspiron 6400 laptop and now when it boots up I get the following error message.
The AC power adapter type cannot be determined. You system will ...
4
votes
2
answers
3k
views
Is a laptop damaged by always keeping it plugged in?
If I keep the power cord plugged in all of the time, will it damage my laptop?
- 41
4
votes
3
answers
1k
views
Danger/risks of switching off the power of a connected USB drive?
I have 2 external USB hard drives which are always connected to my laptop. The reasons are mixed; I need them so often and I'm too lazy to plug/unplug them again and again.
However I'm concerned ...
- 155
4
votes
2
answers
3k
views
Do I need a power strip with power-surge protection for a laptop?
There are simple power strips and power strips with surge protection (and also with short circuit protection). Is there difference in that matter for PCs and laptops? If I use laptop I have a battery (...
user1190707
4
votes
1
answer
19k
views
Power supply makes high frequency noise, is it damaging my battery? (or other parts of the computer) [duplicate]
I bought a new Lenovo laptop, but sometimes used the power supply for my old Lenovo laptop. I just found out that the old power supply was the source of a very irritating high frequency sound (sample ...
- 237
4
votes
1
answer
671
views
Durable power adapter for HP laptop?
I'm on my third power adapter for my HP Pavilion dv4-1435dx in less than one year. I'm not abusing them. I used Mac laptops for 10 years (before needing to switch to a PC) without a problem.
I tried ...
- 2,252
4
votes
2
answers
5k
views
Laptop power adapter output compatibility
I've lost my original power adapter, and I can't find the proper one in any of the stores currently available.
I've HP Compaq 6730b, and as per cutratebatteries.com it outputs 18.5V 3.5A. However, I'...
- 167
3
votes
2
answers
7k
views
Can I supply less amps (3.42 vs 3.95) if the laptop is rated at 3.42 anyway?
I have an Acer Aspire 5000. When I turn it on, the amber power LED blinks 6 or 7 times, and no booting happens. From my Googling, it seems to be a power issue.
I tried swapping out for a different ...
- 1,721
3
votes
4
answers
17k
views
Advantages of a 130W vs 90W ac adapter?
I purchased a Lenovo T420S laptop with a 90W/20V AC adapter P/N 42t4426 through my IT department. Subsequently, I ordered a replacement adapter and received a 135W/20V AC adapter P/N 45N0054.
The ...
- 729
3
votes
2
answers
6k
views
Is it possible to charge a laptop via a USB-C-to-DC adapter plug?
I own a Acer laptop from 2017, which came with a brick-sized 19V/3,42A power supply that's connected via a 5.5/2.5mm DC plug. Although the laptop features a USB-C port, it unfortunately doesn't ...
- 310
3
votes
3
answers
44k
views
Can a power bank work as a laptop battery alternative?
So here's the thing. My laptops battery is almost dead and I'm planning to buy a new one. The problem is that where I live, the power shortage is a very normal issue.
I have a 15 inch basic laptop. ...
- 609
3
votes
2
answers
509
views
Keeping a laptop power supply on without a laptop connected - any negative consequences?
Sometimes I unplug my Thinkpad laptop from its AC/DC power supply adapter and keep the adapter connected to the power socket. Are there any possible negative consequences? Some ideas I was thinking ...
- 3,173
3
votes
5
answers
15k
views
What ampère power supply must I use for my laptop charger?
I have very little idea about electronics. Today I received a replacement charger for my laptop as the old one had been broken, it did not come with the plug attachment. I went to set it back up today ...
- 31
3
votes
2
answers
7k
views
AC adaptor on my thinkpad is making a fizzing noise
The power brick on my thinkpad is making a fizzing/buzzing noise, almost like a highly carbonated drink, just a little more muted. It's still working fine and giving a charge. Is it likely there's ...
- 6,360