The battery charge issue

**Posted:** Mon Apr 11, 2011 3:38 pm

Hi,

I'm happy to get my DSO Quad beta, finally.

I have a question. It seems that I can't charge the DSO. I tried as follows:

1. removed the back cover and connected the battery
2. connected a USB cable and keep charging for a few hours

I can turn on the DSO with the USB cable, but I can't do so without. When with the cable, the screen indicates the battery as empty for first 1-2 seconds, then changes to full as attached. The temperature of the battery seems to be quite normal.

I'm sorry for trouble you, but please let me know if I miss anything about setup processes. I really appreciate your suggestions about this issue.

Best,
Shigeru

**Posted:** Tue Apr 12, 2011 3:26 am

I'm seeing the same issue. It actually behaves the same whether the battery is plugged in or not.

**Posted:** Wed Apr 13, 2011 11:57 pm

it's Incorrect polarity. The right wiring does a red(+) wire below.

**Posted:** Thu Apr 14, 2011 12:24 am

Turn the plug around...

**Posted:** Thu Apr 14, 2011 2:14 am

Its a keyed connector. It only goes in one way.

Mine is the same as the picture. You can't turn the plug around.

**Posted:** Thu Apr 14, 2011 2:23 am

Here is mine... It works.

Attachment:

File comment: Plug

DSO_QUAD.jpg [ 47.58 KiB | Viewed 20637 times ]

It seems yours is wired incorrectly then...

**Posted:** Thu Apr 14, 2011 3:39 am

I suppose I can cut the wires, flip them, solder them back together, and put some shrink tubing on the splice. Did the battery having the wrong polarity ruin the DSO or the battery?

**Posted:** Thu Apr 14, 2011 4:09 am

The battery has protection circuitry, so it should hopefully be undamaged. I think the same goes for the Quad.

**Posted:** Thu Apr 14, 2011 6:36 am

1089 wrote:

The battery has protection circuitry, so it should hopefully be undamaged. I think the same goes for the Quad.

Are you sure the battery is protected? It usually isn't. The Quad charger should be and it's good to see it haven't blow up already

Just switch the wires and try again. Maybe measure the battery voltage before inserting if it's OK (this should apply for any battery).

I believe the guys at Seeed tested the Quad well but they didn't check the separately packaged batteries. Looks like some questionable cheap manufacturer who doesn't care about polarity... This is serious Beta issue and should be good warning for further products and testing before shipping.

**Posted:** Thu Apr 14, 2011 9:23 am

Hi,

Thank you very much to all of you for your suggestions. As you pointed, the direction was wrong.

I was too stupid, since I was so excited.

I just fixed the way connecting, and now I can run with the battery. Still the gauge shows zero and the backlight is dark. I'll try keep charging for a while.

I'm not sure, but a simple protection circuit might be available inside the orange part of a battery.

Thanks,
Shigeru

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The battery charge issue

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