USB real devices charging

A not-appium question really. Anyone gota great solution for keeping multiple attached USB devcies all nicely powered? MacMini seems to be limited to 2 ports to deliver full power/charge and keep tablet devices of both platforms powered properly. Any suggestions as to what devices are helpful hacks to keep things charged or connected and perhaps also still not cause a battery fire?

We were using https://www.amazon.com/Programmable-Industrial-Over-Current-Protection-mountable/dp/B01AKGE75W in the local lab. The power logic has been controlled by a script, which was enabling it by schedule. It could even be more sophisticated by measuring the actual device battery level.
Another solution might be to modify the device charging scheme itself to exclude the battery from the chain and power it directly from the power supply.

1 Like

Nice. I saw similar devices, do they maintain charge on pro series ipads and big android tablets with only 5V supply? That’s a lot of money for a smart hub, are you happy with the hub being reliable?

Mostly have you popped the lid off, does it use jfet or does it use relays for the power switching? I’ll show you my device in a moment, it’s externally/self-powered, but it failed to charge the ipad pro tablet, it might not be negotiating USB power as I was expecting.

445$ wow
we use simple https://www.amazon.de/-/en/i-tec-Charging-16-Port-External-Adapter-16-connections/dp/B07N5K9VR1/ with two macMinis. one with 12 iPhones another one with 13 Android phones

PS the only minus battery on iPhones mostly dead (30-40% capacity from original) while Android phones have no issues. within 3y met swollen battery: 1 iPhone and 4 Android phones.

1 Like

Never tried that with iPad Pro. Basically, the main idea is to avoid devices constantly being connected to the power supply because it negatively impacts their batteries. And this could be achieved in many different ways.

We’ve selected the above hub because it has quite flexible controlling logic and provides Python API for that. The price is so high, because this is an industrial device, which is optimised for work under extreme environmental conditions for longer time periods.

1 Like


This is just a wire splitter, and so it won’t do USBC devices properly, not that that’s a huge issue, but it causes me worry for the lightning connector and apple doing unusual things later. That pic micro lets us swap which port is “live” or powered. Pretty cheap solution, but very limited.

We used these to protect the battery on devices, but I still have one of those famous exploding phone models which grew out of it’s case and I keep it as a warning now. I’ll defo look for a local supplier and grab a unit next year when I know what I’m doing with my device farm.