Testing USB Chargers

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CokemonZ

1106 posts

Uber Geek
+1 received by user: 313

#304455 5-May-2023 10:32

Not 100% sure this is the right forum but here we go.

So I bought a couple of 4 port USB chargers from Amazon that looked legitish - 3.1a per port x4.

Now I have received them they look cheap and I am 95% sure the 3.1a is going to be shared across all 4 ports.

With basically no equipment what is the best way for me to test these and what they will actually do?

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DonH

231 posts

Master Geek
+1 received by user: 158

Lifetime subscriber

#3072665 5-May-2023 13:04

You only need a Mark 1 Calibrated Eyeball for a rough test.

First, see if it has the maximum wattage marked on the case. if it has a figure around the 60 watt range, it is likely to be 3.1 amps per port. If only 15 watts or so, 3.1 amps total for all 4 ports.

Next, size: if it's the size of a small laptop PSU brick, it is likely to be 3.1 amps per port. If it's a "wall wart" with a case not much bigger than required for the 4 ports, it's likely to be 3.1 amps total.

People hear what they see. - Doris Day

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