I don't think those provide voltage for longer than a couple of seconds. They have a timeout; at least mine does. It only provides voltage for a few seconds to start a vehicle, then it shuts off. Also, mine detects if there's already voltage; if there isn't, you have to press and hold a safety button. Because it checks for a bit of voltage in an almost-dead battery to ensure it's connected correctly.

So I don't think it'll work - but check their manual and see if that safety feature I described exists in those models.

Thanks for the reply. I see some have a    12v/10A    3.5mm plug output. Wonder if that would give a constant voltage? Anyone one else?

Check their manuals online for the product and see if it's constant voltage. It should say that there might be a timeout and/or a button that needs to be held to activate if no voltage is detected

I have one of those. You can force it to stay on because it has a USB port output for charging.

I'll test it out tonight!

Didn't get a chance to test this out last night. I hope to tonight!

Speaking about alternative ways to power the EZ-B, is it possible to give power to the EZ-B or IO-Tiny through the battery charging cable? I have never tried this. Looking at the charger itself, it outputs 12 volts. Since the EZ-B and IO-Tiny don't regulate voltage for servos, this could theoretically damage the servos. From what I've read, the EZ-B at least, can handle a minimum of 4 volts, and a maximum of 20. But again, servos.

My apologies for the delay. I finally got around to testing it and the good news is that it does indeed work!

I've had the booster powering an EZ-B for the last hour. I'm using the 12V out but you could also use the 5VUSB out. The booster is designed to charge your phone in an emergency so I surmised that it should be able to stay on until it runs out of juice.

To hook it up I just needed a 2.1mm Male barrel plug to 2.1mm Male barrel plug.

@WiinterU Yes you can indeed power the EZ-B with a 12V AC-DC wall adapter but you are absolutely correct. You can't hook up the EZ-Robot servos to the I/O pins because they are rated to a max of 8.4V. Powering the servos with 12V would damage them. The EZ-Bv4 itself can be powered up from 4.5 to 16VDC.

Ah nice. It has a 2.1mm barrel jack? Mine doesn’t have any like that. It only outputs 12v from the jumper cables. But they don’t get power unless you press and hold the button

different models different features!