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First of all, I lived in Indonesia, so I'm sorry if my English is a bit confusing.

I bought a japan used laptop that is sell in online store. and I got 7A/125V us plug power cable and 100~240V/1.8A 50-60Hz AC Adapter. we use eu socket here, so i buy a us to eu plug adapter with rated voltage 220V and current voltage 2.5A.

Is it safe to use the adapter? I worry cause just realized that the amp in it is lower than the amp in the cable

My power cable similar like this:

my power cable similar like this

The adapter that I bought:

the adapter that I bought

My AC adapter:

my AC adapter

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    Get the adapter for your laptop. It should be one plug, one DC voltage out and 90 - 250 VAC input. That is safe to use.
    – anon
    Commented Jun 8, 2022 at 15:02
  • All you should need is the plug adapter. The 2.0 amp rating on the adapter is the maximum current that can safely pass thru the plug adapter, but your AC -> DC power supply will only draw the current it needs. The fact that the power supply's rating is specified as a range means it can work with U.S. line voltage (110/120v) or European (220v). When I traveled to Turkey, I bought the appropriate plug converter and used it with a smilarly rated power supply without incident.
    – Keith Miller
    Commented Jun 8, 2022 at 15:48
  • Just saw the added pics. You should be fine. The maximum current that can safely pass thru your power cable/adapter combination is 2.5 amps (limited by the adapter). Your power supply only draws 1.8 amps. ` 1.8 < 2.5 `, so you're good to go.
    – Keith Miller
    Commented Jun 8, 2022 at 16:17
  • Please add a photo of where the mains cable goes into the adapter so that we can be sure, but the best, safest, way is to get a replacement cable which fits an EU socket and the mains input socket on the adapter. There is no need for a US-to-EU plug adapter.
    – Andrew Morton
    Commented Jun 8, 2022 at 19:15
  • thank you guys. all of your information is very helpful 👍👍👍
    – garsgersgors
    Commented Jun 9, 2022 at 0:49

1 Answer 1

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You're fine with the adapter you bought.

The ratings on the adapter and cable specify the maximumscurrent that can safely pass thru them. The combination is limited by the lowest rated component, in this case the adapter, so the maximum limit for the cable/adapter combo is 2.5 amps.

The rating on the power supply species the maximum current it draws: 1.8 amps.

So, because the current drawn by the power supply is below the cable/adapter combo maximun, you're good to go.

The fact that the power supply's rating is specified as a range means it can work with U.S. line voltage (110/120v) or European (220v). I used my U.S. purchased laptop/power supply(similarly rated) in Turkey with only a plug adapter and everything was fine.

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  • noted. thank you sir. now i fell safe
    – garsgersgors
    Commented Jun 9, 2022 at 0:51

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