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Questions tagged [laptop]

Portable personal computer, normally with a foldable chassis

0
votes
1answer
85 views

Converting 5V USB to 12V [on hold]

I have just bought a laptop that I would like to be able to charge via my power bank. The power bank in question is Aukey 30000mAh. Specs for the USB port: Type-C Input/Output: 5V 3A Output (Quick ...
2
votes
2answers
691 views

Is it possible to convert 19.5V 3.33A to 12V 5.5A?

I have a laptop charger which has 19.5 V 3.33 A output. I want to use it for raspberry, which needs 5V and 2.5A and for monitor which needs 12V 3A. Is that charger strong enough to run the whole ...
1
vote
0answers
47 views

Replacing 18650 Cells in a laptop Battery

Is it possible to reconstruct a battery of a laptop with better quality 18650 Cells than that are used by the OEM Manufacturers. eg i have a MSI ge62 6qf with rubbed off LG cells so i cant tell what ...
0
votes
2answers
98 views

Why does my laptop emit electromagnetic radiation when charging (only)? [closed]

I have an electromagnetic radiation detector that I've been playing with recently, going around the house and testing various appliances, and I noticed something weird. When I charge my laptop (or ...
-1
votes
0answers
30 views

RT8239B SMPS not enabling

I have a laptop Asus X551CA that i am repairing and am not understanding why the smps is not enabling the LDO's. The type is the B type RT8239B the schematic that the Asus uses is on page 4. I have ...
1
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0answers
30 views

Identifying 6 pin SMD 23ALB7

I need some help identifying these SMD . 23ALB7 with 6 pins. They are found on a laptop TOSHIBA SATELITE L650.
1
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1answer
81 views

Why are input MOSFETs in Laptop power supply always in pairs?

For example, on https://youtu.be/CW87dyYIimE?t=340 (and related work on motherboard), it says the managment chip uses two MOSFETs as a switch (as overheat protection, emergency poweroff on 10-second ...
2
votes
1answer
127 views

Function of the Third Pin Inside Laptop Barrel Connector

So I've been doing research on barrel pin connectors, and have been trying to apply this knowledge to understand laptop barrel connectors, specifically. My confusion relates to the function of the ...
0
votes
1answer
137 views

Is the voltage supplied by an LCD backlight inverter in a laptop dangerous in any way?

It is my understanding that in a laptop, voltage from a low voltage (say 10V) battery can be converted into higher much higher voltages by way of inverter for an LCD display module. Is this voltage ...
-1
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3answers
160 views

Why aren't laptops with transparent displays a thing? [closed]

I just realized that the display on my 2012 Macbook Air is transparent. I had the screen brightness of the built in display on the lowest (off) while using an external monitor, and the sun came ...
0
votes
1answer
69 views

“Creating” a ground pin for my laptop

I am building a sensor using an Arduino connected to a laptop; I noticed that the readout is much more noisy when I use a non-grounded laptop (either running on battery or connected to a power socket ...
0
votes
2answers
92 views

My multimeter probes are too big to measure a laptop battery

I'm having laptop battery problems, and the hardware manual gave diagnostic instructions involving measuring the voltage in the battery. So I bought a multimeter (never used one before in my life) and ...
0
votes
2answers
40 views

Powering 3 identical laptops using a solar panel

I have 3 identical laptops rated at 45W and 20V. The combined wattage of all 3 is 135W. I want to charge these laptops via a solar cell. Do I go for a solar cell rated 135W 20V or one rated 45W 20V?
0
votes
1answer
90 views

Should I continue experimenting or not? [closed]

Good day to you all. I just accidentally stripped off the thin lining of metal that is found on the eDP cable of a Lenovo laptop (Lenovo IdeaPad 320-14IAP). The thing happened when I removed it from ...
0
votes
2answers
113 views

Laptop keyboard backlight ribbon cable broken [closed]

I've accidentally broke my laptop keyboard backlight ribbon cable when disassembling my laptop. I want to solder it back by patching with copper wires or maybe copper plates. My question is, it is a ...
0
votes
2answers
87 views

Voltage drop if power draw is too quick: Does it happen naturally or regulated?

If a laptop forced to drag out more current than the power supply can provide at the given voltage (i.e. 20 volts), the voltage does decrease, usually approximately anti-proportionally if I am correct....
1
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0answers
54 views

Why are 65W and 90W common amongst laptop power supplies?

I have seen Dell 130W, Lenovo 120W, some 230W or 210W gaming laptops, etc. . These are different numbers. But I have seen both 65W and 90W power supplies from Lenovo (65W 20V 3,25A with rounded DC ...
1
vote
4answers
59 views

Which capacity measurement is the correct way to measure?

So I've seen batteries showing their capacity in mAh and I've seen others showing in Wh. Phone batteries are always measured in mAh, while for some reason BatteryInfoViewer on my computer only shows ...
-1
votes
3answers
221 views

Change laptop 5.5mm barrel connector [closed]

I'm looking to replace the female 5.5mm barrel jack connector on my laptop with a female USB C connector. The replacement USB C port need only provide power and nothing further. I'm not sure how to go ...
0
votes
0answers
82 views

How can I test battery amps and Ah?

I have a laptop battery taken apart. The battery should last over 2 hours on my laptop but it's barely lasting 15 minutes so I'm trying to work out why, while also learning along the way as I'm just ...
-3
votes
1answer
51 views

Is it normal to detect voltage inside a disassembled laptop?

In this video I used a non-contact voltage detector and placed it in various points on the surface of the disassembled laptop chassis, behind the keyboard and touchpad. Overall there is not much ...
0
votes
2answers
70 views

What would be the safest method to power a laptop (IdeaPad 510 15isk) from a 14.8v battery pack?

Looking at my existing power jack and measuring it crudely with a cm ruler it looks like 3mm diameter x 1 cm length. The laptop bottom and charging adapter both say 20v @ 3.25 A max. What would be ...
0
votes
1answer
759 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 ...
0
votes
2answers
67 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 ...
-2
votes
1answer
95 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
votes
2answers
118 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
19 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 ...
1
vote
3answers
118 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
votes
2answers
70 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
votes
3answers
842 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 ...
0
votes
0answers
26 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 ...
-7
votes
1answer
107 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
votes
1answer
3k 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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votes
4answers
71 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 ...
-2
votes
1answer
47 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
votes
1answer
66 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
votes
1answer
78 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 ...
-1
votes
1answer
5k 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: ...
-1
votes
1answer
288 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
vote
2answers
329 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
votes
0answers
38 views

How can I determine if my M.2-B socket has PCI-E lanes?

I have a Dell E5450 laptop and it has a M.2-B socket for WWAN cards (as seen here with 4GP3D card). The socket is not utilized, so if it has PCI-E lanes, I would try to make a M.2-B to PCI-E x1 riser....
0
votes
1answer
66 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
votes
0answers
25 views

Power supply lifecycle when turning OFF/ON

I have a laptop power supply: https://www.ebay.com/itm/NEW-100-Genuine-120W-Power-Supply-for-ASUS-G60v-Republic-of-Gamers-Gaming-Laptop-/162584726401?hash=item25dace0b81:g:tMQAAOSwNSxVA9Fc I ...
0
votes
2answers
99 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
votes
2answers
87 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
vote
1answer
86 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, ...
-3
votes
2answers
230 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 ...
1
vote
2answers
61 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
votes
2answers
1k 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 ...
1
vote
2answers
746 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 ...