Questions tagged [laptop]

Portable personal computer, normally with a foldable chassis

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1answer
5k views

Is it safe to rebuild my laptop battery pack? [closed]

this is my first question on this website, so please excuse me if I did not follow the guidelines correctly. I have an Alienware 17 R1 (2014) and have been looking into rebuilding its laptop battery ...
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2answers
2k views

Calculating laptop power consumption [closed]

I'm trying to decide on a portable AC power station to power four laptops for at least five hours. I have the charger units for the laptops, and I'm confused on how to figure out the power consumption ...
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1answer
538 views

How can I properly read the voltage and amperage labels on consumer electronics? [closed]

I have a laptop with a short battery life that has a proprietary high amperage plug that I need to use in a car while that car is in motion, being driven by someone else. The proprietary plug rules ...
0
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2answers
622 views

When is using non-standard laptop chargers safe? and why? [closed]

Looking at using the charger for laptop A to charge laptop B results in a lot of different recommendations, so I am not sure what to believe in. Especially I find that many websites give ...
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0answers
32 views

Restore or replace an old NiCad battery

I was finally able to buy a used Toshiba T4700CT to play my DOS games. I cleaned it, disassembled it and replaced both the backup battery and CMOS battery, but I have a question regarding the main ...
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3answers
550 views

Replace MOSFET AO4433 With FDS6679 [closed]

Good day guys. This is my first time posting, hope you can help me a bit with this. My Sony Vaio laptop from 2009 has two damaged AO4433 MOSFETS near the power supply connector. I want to replace ...
0
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2answers
100 views

Safest way to store a laptop that's rarely used? Plugged in or not? [closed]

I have a laptop (mid-2009 MacBook Pro: aluminum, non-user-serviceable battery) that I almost never use, but might need in the future. The original battery was replaced by Apple a few years ago (The ...
4
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3answers
864 views

Disconnected laptop's internal mic, but sound-card is still picking up sound, why?

I have a HP Mini 5103. A security minded friend wanted me to physically disconnect the internal webcam and stereo mic, no problem as both are individually connected to the motherboard via a wire ...
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0answers
31 views

Software definable battery controller to be able to re-use various laptop batteries

I'm looking to retro-fit an older small netbook Toshiba NB100, by replacing the logic board with the single core Atom 1.6Ghz with an up-board core. A hardware/software solution for re-using the ...
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1answer
327 views

Can I program a Breadboard with a laptop? [closed]

I want to be able to program a breadboard with a laptop, male to male usb cord, powersupply circuit board (which has a usb in port) and breadbord. My question is, Will this setup work?? Basically ...
0
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1answer
16k views

Identify the pins of the circuitry that resides within a laptop battery [closed]

My ASUS laptop battery stopped working all of a sudden, when it had no reason to (new). Windows says "Plugged in, charging" , but the battery always stuck at 0%. Before getting a replacement battery,...
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4answers
73 views

Is it better to get a laptop from your country? [closed]

My knowledge about the inner workings of electronics is very limited, but I'm planning to move country that uses a different voltage system and I was wondering if it would matter if I bought a new ...
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1answer
48 views

laptop battery longevity / fear of burn out [closed]

i have asus t100ha, that i use it 24h a day, or better said i wish that icould, since my partner unplugs it due to extreme energy consumption fear. now the laptop has 2 lipo batteries, each being 3....
0
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1answer
268 views

May I replace ICR 18650 22F with 26H in Laptop battery?

As in the title, I have a worn laptop battery, made out of 6x SAMSUNG ICR 18650 22F. Now I can't find any 22F near me, nor slightly farther for a sane price. But SAMSUNG ICR 18650 26H are practically ...
0
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1answer
111 views

How to build EMF radiation protection [closed]

I've recently started to use my laptop more and more on my lap and I'm worried about exposire to radiation emmited by the laptop. I keep it at a distance of about 10cm but still... I was wondering if ...
0
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1answer
11k views

Using a usb-c laptop charger to charge a phone [closed]

I don't really know anything about electronics and I'm not sure if it's the right place to ask, but still. Is it OK to charge my phone with my laptop's charger? Here's info on the laptop charger: ...
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1answer
629 views

4A XL6009 DC-DC For Laptop Charging [closed]

I live in a place that suffers from electricity shortages, I have a 12V 20AH battery and I want to charge my laptop using it, rather than buying an inverter I thought it would be more efficient if I ...
1
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2answers
570 views

Lenovo Y580 battery - Panasonic NCR18650b MH12210

I am new to the group, so thank you for this great community. I am a student and "DIYer" and like to repair simple electronics. Anyway, so here is my situation: Want to repair my laptop battery as ...
0
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1answer
118 views

laptop battery care [closed]

Many people keep their laptops plugged in and charging when using them at home, and rarely if ever take them out of the home. This keeps the Lithium battery at 100% State Of Charge (SOC), which I ...
0
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2answers
182 views

Trouble finding how I can plug in this Molex connector from a Laptop Fan [duplicate]

I recently bought this fan, I am trying to power it for an external project that doesn't revolve around laptops; however, I don't know how to get power to the fan without cutting off the molex ...
0
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2answers
201 views

why my laptop can't use wireless charging technology? [closed]

we start to deal with wireless charging technology in recent years with the booming of smart phones why wasn't it possible with laptops? does the smart phone's battery differ from laptop's?
1
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1answer
155 views

Replace laptop's usb surge protection chip [closed]

I am fixing an old laptop from 2008 (eMachine e525) on which everything works fine expect the 2 usb ports that are not powered. I found this video¹ from Ingmar M. on youtube (very helpful video, ...
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2answers
608 views

How do I do to solder the adapter in the port and still use the same usb port without ruining the notebook? [closed]

I have a laptop that the wireless network card does not work, but I do not want to use my usb input for putting an external adapter, my idea is to open the laptop and solder the adapter inside the ...
2
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2answers
85 views

20V laptop power supply from four 5V+5A 'baby' supplies

I've got an old gaming laptop which comes with a very annoyingly big brick PSU, rated at 100W and 20V. I do not care that the PSU is heavy, but it has a weird form factor, and I always have to drag ...
0
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2answers
3k views

Scratched 18650 Lithium Battery safe to use? [closed]

I tried to salvage 18650 batteries from a dead laptop battery, in the process I peeled off and scratched the metal casing a little bit with my utility knife (see attached image below), Other than that ...
2
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2answers
1k views

Replacing cells in laptop battery

I successfully opened the battery of my laptop without damaging the case, and now, I want to replace the worn out batteries (2600mAh) with more powerful ones (3200mAh). I know the risks of working ...
0
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1answer
136 views

Why laptop reboots after electrostatic discharge

So why does this happens when my laptop is plugged to the charger? Typical charger scheme looks like this: What is the path for discharge current? Low voltage part seems to be isolated from power ...
1
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2answers
155 views

What type of a connector is this?

What type of a connector is the white one in the middle of the photo. It has pins on both sides and connects to the underside of a laptop motherboard. I'd like to find an extender for it so that I ...
0
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2answers
2k views

Is it possible to increase amperage and voltage?

I have an input of 5V and 2 amps from a USB battery pack. Using this voltage and amperage, could it be possible to increase both values? Here is an extremely simple representation of my idea.
4
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1answer
800 views

Proper way to recover 18650 cells from laptop batteries [closed]

I'm looking for a tutorial on how to recover 18650 cells from laptop battery packs. Like what should I do, and what should I not do, how to test them to see their condition. The way I'm doing it now ...
0
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3answers
2k views

power 12v fan using laptop charger while running laptop

I have a laptop with partially damaged internal fan. Dont want to buy new one. I am thinking of swapping the internal fan to a 12V fan. The 12V fan I have can fit as it is small. Internal fan is 5V. ...
5
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6answers
586 views

why do laptops have 10 or 20 volt batteries if most components only use logic level voltages

I've noticed that often laptop chargers and batteries are higher voltages than logic levels, 1 to 5 v. I am building a laptop and was originally using 3.7 v lipo battery. I am curious if I should put ...
0
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1answer
246 views

What can cause a very low frequency sound from a laptop? [duplicate]

I have a Clevo M57RU laptop here. Whenever it goes to stand-by, sleep or is shut down I hear a VLF sound (presumably close to the ~20 kHz maximum of the human ear) that's even better to hear if the ...
3
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3answers
1k views

Are laptop cells balanced while charging?

I have little-to-no knowledge about how the laptop batteries work. I know there is a microcontroller to actually verify the balancing between cells (and in case blow up a fuse or something similar). ...
0
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2answers
434 views

What is the connector on lenovo ideapad miix board called?

The connector on board of keyboard of lenovo ideapad miix 300-10iby tablet. Male part: Female part:
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1answer
165 views

Intellectual Property of Laptop Connectors

I want to know if all the connectors of the laptop have intellectual property or copyright, I do not know how it would be said in this case, or only those modified by the companies for their specific ...
0
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1answer
2k views

Can 12v destroy a laptop instead of 11.1v

I am making some experiment on the 18650 battery, I learnt that their charging voltage is 4.2v while nominal voltage is 3.7v. I made a 2ways parallel connect of 3 serial connection just like the ...
2
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3answers
146 views

Pulling analog DC output from a laptop

I am using a laser source that can accept analog input (0-5 V) to set light intensity levels. The input impedance of this driving voltage is 50 Ohms. Typically this is connected to a function ...
2
votes
2answers
943 views

Grounding a laptop through the DC-jack?

I would like to reach zero potential difference between me and my laptop (to avoid ESD) before opening the back cover. I'll connect my wrist strap to a common ground point, thru a resistorized coil ...
0
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1answer
101 views

Unknown Litium Ion Batterys [closed]

i have a laptop battery pack which i took apart and kept the batteries, hoping to make a battery bank, but the problem is i cant find any info on the batteries, they are all red and have a green mark ...
7
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2answers
5k views

Is there a standard I2C/SM bus protocol for laptop battery packs

I'm building a laptop with a custom battery pack. I know that the pack has to communicate through an I2C/SM port on the motherboard, but I don't know how to make the bios/os recognize it. Is there a ...
0
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1answer
271 views

Why fully cycle Li-Ion laptop battery?

The manual for my new laptop clearly states that partial charge cycles of it's (Li-Ion) battery should be avoided. It recommends to always discharge to automatic shutdown and then charge back to 100% ...
3
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0answers
306 views

Offical Name of Dell/HP Common Laptop Power Jack/Plug [duplicate]

I have seen this question asked before, but never has it gotten a real answer. With the popularity of this plug I find it hard to believe it does not have a standard name or IEC name. Does anyone ...
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1answer
114 views

Smartest way to make an 180w SMPS?

So i own this gaming laptop (MSI GX60) which draws a lot of power, the original charger i had recently broke, and i new one. But with that kind of power it costs around 60$ which is a bit much money ...
0
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2answers
5k views

Plug in charger in laptop before plugging in mains outlet [duplicate]

Feel free to delete the question if doesn't fit here. Somebody told me, that a person should plug the charger in the laptop side first, then in the mains outlet, as if there is a current peak, it is ...
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2answers
5k views

charging a lead acid battery bank with a 19v laptop charger

I am new to the forum and I notice that you have decent positive discussion and tips which also includes noobs on any given electrics related topic, I was requested to post it as a new question here: ...
1
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2answers
327 views

Charging multiple laptop batteries

I want to build me an electric longboard, and I was planning to run it off of 4 or 5 11.1 volt laptop batteries... I want to wire them in parallel (The sets of 11.1 volt), and charge it as one big ...
0
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1answer
2k views

Using a laptop charger with the wrong polarity? [closed]

I just bought a replacement charger for my Fujitsu Lifebook AH532, but it seems like it has the wrong polarity. The backside of the laptop has a label saying it should be like this: https://imgur.com/...
0
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1answer
359 views

Laptop Charger Failure during AC supply undervoltage

My Laptop Charger is rated 240V AC Voltage. While plug in the outlet the undervoltage occurs (using multitester) the voltage is 107V. At that instant my charger is very hot, right now my charger is ...
2
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2answers
1k views

laptop battery connector name [closed]

I want to know what is the name or family name of the laptops' battery connectors? I want to replace a broken connector but don't know what to search for on digikey/mouser. Image of connector below: ...