USB power adapter


  #1  
Old 09-05-22, 01:19 PM
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USB power adapter

I have an LED desk lamp
powered by a USB adapter. The adapter specs are
Input: AC100-240V
50/60 Hz 0.6 A
Output: 5.0V ----2000mA

Light stated to blink and stopped turning on. Checked the USB plug and the power brick was very, very hot. It over heated.
Light still works if plugged into my computer USB port. My question is, with the specs as stated will it cause any damage to the computer?



Supposedly it has a 4-year warranty. I put in a claim, and they only asked for the brand, what was wrong, my Amazon account. Without asking about proof of purchase (but apparently, they have a record) they immediately refunded $35.99 into my Amazon account to buy a replacement.
Since the light works, I plan on buying just a replacement power USB adapter brick of the same or close specs.
 
  #2  
Old 09-05-22, 03:09 PM
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I would use a higher current power supply.
 
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Old 09-05-22, 07:55 PM
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That 5.0v & 2.0A phone-charging standard is common for cellphones newer than about 5 years old or so.
IIRC my Samsung LTE phone from 2015 had a 2.0-amp charger. You can probably scrounge through a thrift shop and find plenty of 5-volt 2-amp power cubes.

The early USB 2.0 standard was 0.5-amps, bumped up to 1.0 then 2.0, until now USB-C will push 5.0-amps at 5.0-volts. So, old equipment might want to draw more than 2.0-amps, but newer computers & power cubes will limit the current to avoid damaging the device.

One of the more useful things I've found are the multi-outlet plates that come with USB plugs.
 
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Old 09-05-22, 08:10 PM
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For the cost reimbursement of the unit, I'm buying new power brick along with several other electronic accessories I need. I have a number of accessories already attached to the computer. Best I do not push it any further.
Thanks guys.
 
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Old 09-06-22, 09:44 AM
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Originally Posted by Norm201
Best I do not push it any further.
Well, it DOES make sense to sort through those old 'power cubes'.

Example, I just finished switching family phones, tablet, and earbuds over to wireless charging.
Actually quite convenient, the charging antenna fits nicely under the phone/tablet case.

BUT, then had a tablet that stopped charging- tried everything.
Eventually realized that, in trying to 'clean up' the clutter of USB chargers / 'power cubes / wall warts,
I had a 2.0A wireless charger being fed by a 1.0A supply.

So, check the ratings on those USB chargers, oldest I have is a charger for a Samsung 'candy bar' form phone that only puts out 0.55A, followed closely by LG & Samsung that only put out 0.7A.

 
  #6  
Old 09-06-22, 10:54 AM
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I have lots of power bricks, but none of them came close to the specs needed.
 
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