PC, every single EZ-B v4 is tested. I am unable to understand your message. Are you saying that the EZ-B v4 continues to say "My Battery Is Low"? Or are you saying it doesn't power up at all?

From your post, it sounds like you received the low battery warning. If that is the case, the EZ-B is working and requires either higher voltage as per the datasheet, or it requires the power monitor to be disabled.

If you can clarify, we can help

Sorry. I connected the wires from the battery holder to the 'plug'. I read good voltage on the screws you have to tighten to hold the wires. But the inside and outside of the barrel didn't show voltage. I finally used a wall wort - an AC to DC plug and it outputs 5 volts at a similar plug barrel? So I plugged that into the base and it came up. Of course it isn't the 7.2 volts required, but 5 so I am getting battery voltage low, but it works. I tired it again with the shipped plug but it didn't work. SO - that plug in part that you ask us to put the wires into seems to not be working.

I spliced an old 9V battery holder plug to the wires from the battery holder and it powers up fine. So by process of elimination it appears to be that green and black plug not allowing voltage from wires from battery holder to barrel. confused

Okay, that helps Thank you - we can send another plug out, first let's identify the cause to be certain. I've never heard of the alternate power plug not working before. That blows my mind! confused

Let's have you run a few tests to identify the cause for certain to ensure you get the correct replacement.

1. Put fresh batteries in the 6xAA Battery Holder

2. Ensure the wires at the 6xAA Battery Holder have bare exposed at the end. So that connectivity can be made

3. Check for voltage across the Red and Black wires of the battery holder. How many volts does it read?

4. Loosen the screws of the Alternate Power Adapter and follow the directions in this video...

5. As it sounds like you have already done, check for voltage between the barrel's inside and outside of the Alternate Power Adapter

6. Lastly, check the voltage across the two screws of the Alternate Power Adapter which tighten to hold the wire in.

This procedure will help identify if it's the 6xAA Battery Holder or Alternate Power Adapter

Also, you can disable the battery monitor to continue using your EZ-B v4 with less than the desired voltage. Please reference the Low Battery Warning section of the datasheet here: https://synthiam.com/Tutorials/Default.aspx?id=7

1. Batteries in 8.12 volts at wire ends. (rechargeable are recharging - using standard 1.5 AA batteries)
2. Put wires into alternate power adapter.
3. Measure voltage at barrel inside - 0.0 volts.
4. Measure voltage at screws - 8.12volts.

My vote would be alternate power adapter

Seems that way! Let's get you one. I'll put a note on Jason Z's desk to get one sent out to you right away

If you have an old power adapter with a barrel plug that you can spare, cut the end off a few inches from the plug. Strip back the wires and you can attach them to the 6xAA Battery Holder for the meantime.

Glad to hear the EZ-B v4/2 Wi-Fi Robot Controller is working - Jeremie B personally tests every one. He's more OCD than I am. He would be surprised to hear an EZ-B was shipped not functioning.

Ohmed neg screw/terminal to barrel - shorted. Ohmed pos screw/terminal to inside barrel - open no connect.

Wow, That's weird. I guess even a simple little thing like this can make something look really broken.