Nice cheap charger, can't identify caps.

[jazzie366]

So I got this cheap what seems to be quick charge 2.0 charger with my Umi Plus E phone. For those who don't know, UMI makes more, "upscale" as I'll call it china phones. AKA they use a lot of japanese parts where it matters, and the phones build is nice with a good OS, but that's about it. They do cost significantly more than other manufacturers.

Anyways, here's the charger that came with it, I found the manufacturer and was thinking about buying a ton of chargers from them as safety is very good in them.

If these were to sell for around 9-15$ USD a piece on Amazon, would you guys buy it? Looking for some thoughts.

Side note: Newer model of this charger did away with the electrolytics on the output, uses polymer caps now. Edit: Also newer model is QC 3.0.

[budm]

Re: Nice cheap charger, can't identify caps.

Do you have UL E?????? as printed on the case?

[jazzie366]

Re: Nice cheap charger, can't identify caps.

Do you have UL E?????? as printed on the case?

UL number is for the PCB only, however these should pass UL without issue, most manufacturers require the buyer to do it, or sell them without the label, even though they'll pass just fine. However, the UL number is legitimate.

[budm]

Re: Nice cheap charger, can't identify caps.

For the PCB , yes, it is legitimate UL number, but for the PCBA that is another story because of the components be used, I.E. Transformer (since there is no safety GND, the transformer has to be double-insulated type), X/Y cap etc. If I were you I would at least do the safety leakage current test before trying to sell it, the manufacturer should be able to provide that if it has gone through the UL test lab.
Page 22.

[jazzie366]

Re: Nice cheap charger, can't identify caps.

For the PCB , yes, it is legitimate UL number, but for the PCBA that is another story because of the components be used, I.E. Transformer (since there is no safety GND, the transformer has to be double-insulated type), X/Y cap etc. If I were you I would at least do the safety leakage current test before trying to sell it, the manufacturer should be able to provide that if it has gone through the UL test lab.
Page 22.

Hey, sorry for this late reply.

So I was gonna either use Intertek or UL, either one is sufficient. The transformer is double insulated, and my friend is going for electrical engineering. They ran an insulation/leakage test on it, it passed without issues. Only problem I have is that we couldn't test above 1kV.

However, I found an even better manufacturer, only problem is I do not think they make a Qualcomm 3.0 charger, which is what I am looking for. This manufacturer though has UL listings on their products, so that's already taken care of. The transformers also seem to have extremely high ammounts of insulation, because they have the double insulated wire, but then there is another layer of insulation on top of that, so triple insulated?

[budm]

Re: Nice cheap charger, can't identify caps.

Are you going to send the final product to be tested by UL?
At my work here we do not use UL for compliance testing any more, they are such rip off. We use Intertek, TuV, and ETL.
Be prepare for sticker shock. Make sure to have all the paper work for all the critical components.
We spend close to $1M a year on our compliance, and they will charge you a lots if any of the critical components are changed later on, you will also have to pay for yearly fee and also random inspection.

[jazzie366]

Re: Nice cheap charger, can't identify caps.

Are you going to send the final product to be tested by UL?
At my work here we do not use UL for compliance testing any more, they are such rip off. We use Intertek, TuV, and ETL.
Be prepare for sticker shock. Make sure to have all the paper work for all the critical components.
We spend close to $1M a year on our compliance, and they will charge you a lots if any of the critical components are changed later on, you will also have to pay for yearly fee and also random inspection.

I was going to do the same, I was told that UL is an incredible rip off, so I'll use Intertek and the like, as that's what I'm seeing in other manufacturers as well. The final product will be sent to them for compliance testing, also I think the company actually just got a UL/Intertek certification for the charger, I'd have to check again, but I'm not sure. If so, then I don't have to do anything.