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my original power cord I got with my laptop charger stopped working recently.

It had a power adapter rating of 10A/250V, and the part which plugs into my charger had a rating of 2.5A/250V.

I just got a new power cord and just noticed the ratings: enter image description hereenter image description here

Here's my charger power rating and details: enter image description here

Can I safely use this power cord with the adapter, or will it cause issues and cause my laptop/charger to fry?

Edit: I was researching and as I read online, it said it is important to match the voltage ratings. I'm moore concerned about the 300 V rating which will be plugged into the charging brick even though the charger specifies an input of 100-240V.

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    \$\begingroup\$ What potential problems do you forsee with this? What is your understanding of the numbers? \$\endgroup\$
    – Transistor
    Commented Mar 27, 2021 at 8:47
  • \$\begingroup\$ @Transistor I was researching and as I read online, it said it is important to match the voltage ratings. I'm moore concerned about the 300 V rating which will be plugged into the charging brick even though the it specifies an input of 100-240V. \$\endgroup\$
    – Ayush Gupta
    Commented Mar 27, 2021 at 8:50
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    \$\begingroup\$ OK. What do you think the 300 V rating on the cable means? (I'm getting you to think through this.) \$\endgroup\$
    – Transistor
    Commented Mar 27, 2021 at 8:52
  • \$\begingroup\$ @Transistor I'm assuming it means it means how much voltage it can transmit to the appliance depending on the power coming in from the power socket. I understand there will be some resistance built into the charging brick itself for safety purposes, but would it be enough to handle the 50V difference in the worst case? \$\endgroup\$
    – Ayush Gupta
    Commented Mar 27, 2021 at 8:55
  • \$\begingroup\$ See my answer below. \$\endgroup\$
    – Transistor
    Commented Mar 27, 2021 at 9:01

2 Answers 2

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From the comments:

I'm assuming it means it means how much voltage it can transmit to the appliance depending on the power coming in from the power socket. I understand there will be some resistance built into the charging brick itself for safety purposes, but would it be enough to handle the 50V difference in the worst case?

Close. The 300 V is the maximum voltage the insulation between the wires in the cable and the pins and sockets in the connectors can withstand. That means it is rated for use at any voltage up to 300 V. Your supply is probably 230 V so the cable is more than adequately rated. (The cable doesn't generate a higher voltage. It's just copper wire.)

I was researching and as I read online, it said it is important to match the voltage ratings.

You need to match the adaptor to the mains voltage, not the cable maximum voltage rating.

I'm more concerned about the 300 V rating which will be plugged into the charging brick even though the charger specifies an input of 100-240V.

Hopefully it's clear that this is not an issue.

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  • \$\begingroup\$ Got it, thank you! \$\endgroup\$
    – Ayush Gupta
    Commented Mar 27, 2021 at 9:02
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The power cord will work fine. It is just rated to withstand more voltage than you need and more current than you need.

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