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- Charger compatibility, same voltage, same jack, lower amp

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08-02-2019 09:43 PM
Hallo,
A fairly simple question. I used to have 2 HP laptops with exactly the same chargers so 1 was always in my office at home and 1 in my business travel bag. Now I had to replace 1 of the laptops and it came with a gigantic and heavy adaptor. This new adaptor has the same voltage output as the old one, the same jack but a higher amperage output (and consequently higher Wattage). I'd like to keep using the older and lighter charger for the new laptop during business travel, meaning using the charger with the lower amperage for the laptop that came with the higher amperage output charger (not the other way around).
I know something about electricity and I know that if the Voltage is the same but the amperage is lower, it normally shouldn't be a problem (not from an electrical point of view). It would only take longer to charge because it draws less amps. It's the same jack so there are no compatibility problems there either.
However, we're dealing with electronica here, so I assume the laptop will notice that it draws lower amps than it should (my Samsung phone warns me too when I use an older charger with a lower amperage).
So will it give me any problems? Will the laptop refuse to use the slower charger, will it effect some kind of system monitoring tool and result in my laptop misbehaving? Or some other problem I haven't thought of yet.
Many thanks in advance for your answer!
08-03-2019 06:43 AM
Can we have the actual model numbers of the laptops involved and the part numbers of the adapters? Can't really give advice based on partial information. Theoretically, if the adapters are the same voltage and use the same plug type, you can use the lower wattage, same voltage adapter to charge the battery. I would not run the laptop on it. They gave you the big honking adapter for a reason. Odds are the new laptop with the big adapter has a dedicated graphics card and actually needs that much power. If you try to run on the lower powered one you risk system cutoff and damage.