All Questions
Tagged with adapter battery-charging
15
questions
0
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28
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Power adapter output voltage detection [duplicate]
Not sure if this is right place for this question, but since I don't know where else to ask, I will do it here anyway - if this is wrong exchange, please let me know ...
I have 35 W phone charging ...
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0
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1
answer
49
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How can the voltage of the original battery differ so much from the voltage of the original adapter?
It's about Xiaomi Mi Notebook Pro 15.6" 2019 JYU4148CN.
The original battery has a voltage of 7.6V and a current of 7.9Ah, the total Capacity is 60,040 mWh.
The original adapter has a voltage of ...
- 101
-3
votes
1
answer
367
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Power adapter 12V for charging LiFePo4 12V battery with BMS with passive balancing
I have a project where I need to charge an Enerpower LIFEPO4 Battery of 12V 12Ah with BMS with an integrated passive balancer, protection against overcharge, deep discharge, over-discharge (...
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1
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2
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268
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Using a 100W External Power Pack to Run / Charge an Old 19.5v Laptop [closed]
I have just ordered the new Flash 2.0 battery pack. Specs are here, but briefly:
100W USB-C Power Delivery 3.0 Output: 5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/5A (PPS)
I've also got an old HP Pavillion ...
- 113
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2
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64
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Can switching adaptor perform constant current mode?
I want to ask about wall adapter (switching) with 2.5mm jack
let's assumed its label as 9V 2A.
I saw many tutorial even some product use normal adapter (2.5mm jack) with BMS module to charge Li-ion ...
- 1,424
0
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2
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2k
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How can I use a US 120 volt Ryobi charger From a 220 volt main? [closed]
I bought a ryobi kit in the us and I want to use it in in Europe.
I doubt that I can plug it directly into the socket, what kind of converter/adapter do I need?
Is there a way to adapt the charger ...
1
vote
2
answers
9k
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Laptop battery and adapter voltage ratings
Considering a 4-cell (laptop) lithium-ion battery, the cell voltages add (since they are in series) to 3.7 V * 4 = 14.8 V. However, the adapter says that it has a 19.5 V DC output. I want to know why ...
user172541
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0
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35
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Replace a power adapter 12V/1A DC with 15V/0.8A [duplicate]
I have a battery-charger that has an input of 12V/1A as specified in the specs.
Can I replace the adapter with a 15V/0.8A ...
- 101
0
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7
answers
8k
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Calculate the electric bill of a phone charger (AC adapter input or output?)
I need to calculate the amount of money I pay for charging my phone with this charger
I know that I need to calculate the watts then kWh, so I multiplied 5 V by 1.55 A to get 7.75 watts and then use ...
- 5
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votes
3
answers
150
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Is 19V safe for charge Ni-Cd batteries?
I have 5 Ni-Cd battery(1.2V 2200mAh). They connected in series. I have a 19 V 3.42 A adapter. Will it make a problem when I charge Ni-Cd batteries with my 19 V adapter? Is 19 V dangerous for charge Ni-...
2
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1
answer
2k
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Question on 3DS power adapters, minor voltage difference [duplicate]
I am going to be traveling overseas and bringing my Nintendo 3DS which the adapter outputs DC 4.6V 900mA.
I found an unofficial USB cable to charge it and I was curious if the minor variance in the ...
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-1
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1
answer
1k
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Charging my laptop with a universal adapter [closed]
My laptop charger's adapter recently died, and as a new one of its kind was very expensive, I got a universal one for free (here is the model, I couldn't find a link in English though). The charger's ...
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-1
votes
1
answer
266
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Adding AC adapter to solar powered device
I have a solar-powered LED number display whose rechargeable batteries have apparently died. I'd like to hook it up to AC power using a 3V adapter (i.e., cutting the leads from the batteries and ...
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-4
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4
answers
31k
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Can a phone charger be adapted to charge a laptop battery? [closed]
I've obtained a laptop that has no charger. Short of buying another charger online, can a phone charger be adapted to charge the laptop's battery, provided it's disconnected from the laptop (i.e., the ...
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-1
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1
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57
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Do I need the battery to be present if notebook connected via Car Universal Laptop Power Adapter? [closed]
I am going for holiday and I want to use my old old Acer. The battery lasts for about 10 mins if not connected to the electricity outlet.
If the notebook is connected via Car Universal Laptop Power ...
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