recharge a laptop with a 20V tool battery?

Poppy

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I have a HP Pavilion 15 laptop.
I also have a number of Ryobi 18V batteries. They are 20V when fully charged.
My laptop takes this as a charger input
45W 19.5 volt 2.31 A AC adapter charger.

Do you think I could use a connector like this and wire it to the power input plug sized to fit my laptop?
Would i be able to run my laptop on my tool batteries?
OR would I be able to transfer the stored energy from my tool batteries to the laptop battery?

1697676536090.png
 

alpg88

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It is a crazy idea, but i do not see why it should not work if voltage matches the power brick. Thou some laptops need 300w power supply, like my wife's lenovo legion, it would not charge with 68w lenovo PS that my comp. uses, the plugs are identical, and it works the other way around,
 

Poppy

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I figure that I have power banks to recharge my cell phones, why not have a power bank to recharge my lap top?
I bought one of these to charge it from my car's power port, and it sits in my daughter's car, so I have another one sitting in my amazon cart.
1697715489884.png
 

BVH

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Poppy, check this out.

 

orbital

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If the output & input voltage match, then yes. I'm always looking/geeking at this sorta thing.
Your Ryobi batteries have low voltage control right?


..also that pesky Type C {PD} powerbank at 20V I always bring up.
 

dragosios

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Some laptop power supplies have active circuits which identify the power supply so they will refuse to charge without identification.
But strictly from an electrical perspective should work. Remember to respect polarity and try, worst case will be not charging.
 

orbital

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This is the power supply it uses.
It's a HP Pavilion 15
How do I get the answer to this question?
"does your laptop have a true PD input? and not just a basic Type C"
+

Older Type C isn't Power Delivery,
maybe it says it in your specs

Wasn't sure on my laptop, but it actually says USB PD right on it
______ _________

If you don't have PD, what type of DC input do you have from your charger? there can be many..
again, maybe it says it in your specs (example 5.5x2.1)
or you'll have to figure out yourself to make the cable.

Trying to say, it's not impossible Poppy
 

Poppy

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Older Type C isn't Power Delivery,
maybe it says it in your specs

Wasn't sure on my laptop, but it actually says USB PD right on it
______ _________

If you don't have PD, what type of DC input do you have from your charger? there can be many..
again, maybe it says it in your specs (example 5.5x2.1)
or you'll have to figure out yourself to make the cable.

Trying to say, it's not impossible Poppy
19.5 V 2.31 A
 

Poppy

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HP says that if you have a usb C port you can charge it through that, with either a wall wart, or battery pack.
I'll give that a try.
First I'll have to run the battery down a bit.
Well, I gave it a try, and the laptop battery was charging my battery pack, not the other way around.

Yes @turbodog I consider getting one of those inverters, every now and again. But my wallet wins out vs the desire to get something that I haven't NEEDED in the past 20 years.
I also figure that it is relatively inefficient to boost the voltage up and then buck it back down.
 

orbital

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How did you connect your Ryobi to your laptop?

Sometimes the sequence of connecting things together determines which way the current will flow w/ PD
 

orbital

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Poppy,
let's focus on your dc input (where your charger plugs into)
Looking it up, I believe it's a 4.5x3.0mm round barrel type.

Only use the white (positive) & black (negative), you can connect to your Ryobi battery

 

Poppy

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Poppy,
let's focus on your dc input (where your charger plugs into)
Looking it up, I believe it's a 4.5x3.0mm round barrel type.

Only use the white (positive) & black (negative), you can connect to your Ryobi battery

@orbital thank you for your effort to help.

Let me rephrase my question.

I have a HP Pavilion 15 laptop.
The charger delivers:
45W 19.5 volt 2.31 A

Would it be safe to direct drive from a Ryobi 18/20V battery into my laptop?
 
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