With buying a charger hopefully it is something someone's reviewed and tested it before properly and then hope they didn't change it between then.
And then sometimes it's charge logic and what happens when things are plugged in. Such as charger from Brand A might negotiate a charge rate only once a product is plugged in. Leaving the remaining ports to fight for what's left. And Brand B might re-negotiate EVERYTHING any time anything is plugged in.
Here's a situation where Brand A Scenario is preferable. For example when charging an item with a 90% cutoffs hardware based logic which you can't get around and you're in the trickle charge state. When you plug in another device it doesn't cause a re-negotiation.
When Brand B with this same device. But with re-negotiation after every plugin. It will ask this 80% cutoff device how much power it needs and it goes Zero because its logic is not to charge if above 90% even though you never removed the plug and it was in the final trickle charge state.
The big thing with chargers that boast 120W. And you need 60W or above. Is how it treats ports. Like some 120W claimed chargers will only go 60W or above is NOTHING else is plugged in. As soon as something else is plugged it everything goes 30W max.
So on Amazon what you're looking for is the one star Red Flags. Where Verified buyers who hopefully aren't competition Shills. Explain how a device isn't working to spec.
And then sometimes it's charge logic and what happens when things are plugged in. Such as charger from Brand A might negotiate a charge rate only once a product is plugged in. Leaving the remaining ports to fight for what's left. And Brand B might re-negotiate EVERYTHING any time anything is plugged in.
Here's a situation where Brand A Scenario is preferable. For example when charging an item with a 90% cutoffs hardware based logic which you can't get around and you're in the trickle charge state. When you plug in another device it doesn't cause a re-negotiation.
When Brand B with this same device. But with re-negotiation after every plugin. It will ask this 80% cutoff device how much power it needs and it goes Zero because its logic is not to charge if above 90% even though you never removed the plug and it was in the final trickle charge state.
The big thing with chargers that boast 120W. And you need 60W or above. Is how it treats ports. Like some 120W claimed chargers will only go 60W or above is NOTHING else is plugged in. As soon as something else is plugged it everything goes 30W max.
So on Amazon what you're looking for is the one star Red Flags. Where Verified buyers who hopefully aren't competition Shills. Explain how a device isn't working to spec.