It looks like BlitzWolf_40W_5_port_usb_charger and Eachine_PA40W_5_channel_usb_power_charger share the same board. But Eachine is using a much better quality 2014 rev., and BlitzWolf_40W_5_port_usb_charger a 2013 rev.
I am not sure there is much quality difference between the boards.
Many 5 port usb chargers uses revisions of this board, some of them better than other (Anker has electronic overload protection, not a fuse).
Thanks for all the USB mains adapter testing and the details how the 2.5 and 5kV test are done using the Uni-T 513: test time usually less then 30 seconds and your quote:
Regarding the category of smaller green ticks (possibly safe, haven’t read the CE test report): Have you ever tried a distributor/manufacturer to ask for their CE test report?
Investigators have warned consumers they face potentially fatal risks after 99% of fake Apple chargers failed a basic safety test. From a report on BBC:
Trading Standards, which commissioned the checks, said counterfeit electrical goods bought online were an “unknown entity.” Of 400 counterfeit chargers, only three were found to have enough insulation to protect against electric shocks. It comes as Apple has complained of a “flood” of fakes being sold on Amazon. Apple revealed in October that it was suing a third-party vendor, which it said was putting customers “at risk” by selling power adapters masquerading as those sold by the Californian tech firm.
I like your table but maybe you can be more specific about the risk.
What is the risk of the person getting a mains shock?
What is the risk of destroying your device being charged?
@HKJ: are you referring to the isolation distance being too low when the power is still high AC, before it’s converted to 5vdc? I’m still learning, and I’ve seen cuts in circuit boards in high voltage areas to isolate components.
No, between the mains voltage and the low voltage (There are some legal requirements).
The distance between mains voltage parts can be fairly low without any trouble.
I created some an example table for the features of some review requests:
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And i like to suggest an table for USB powerbanks (you called them USB battery box sometimes).
Especially how well it is usable as UPS.
Helpful categories would be:
pass through charging (usable as USV)
output turns on when (manual/automatic; button/load)
output turns off when (manual/automatic; voltage of battery, current of load)
I’m a regular user, so I didn’t know about these risks and I’m a little shocked, I have two SLS-B07 model chargers that is plugged 24/7 at home and at work, even bought 3 more to user in the other rooms. However, when reading your review I am very scared, should I throw it away and lose my money? What risk do I have when using this device? If it is plugged into the outlet with no charging device still a risk? If I have a smart plug (which is supposed to have discharge protection) and plug those devices into these outlets will I be protected? Now I want to also know if my smart plugs are really safe. Hahaha
The risk I identified is that over voltage will break down the isolation and supply mains linked voltage on the output, in addition it has very high ripple. With this charger the next thunderstorm may make it lethal.
I would get rid of them as soon as possible, if you have lived with the risk a day, a week or a month more is probably not a big issue (Except if you are unlucky).
One of my big issue is non-safety rated caps, a thunderstorm may break it and leak mains voltage!
The very low creepage distance means that it is dangerous when there is a thunderstorm in the neighborhood or if you live in a industrial area.