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powerboost shield 500mA appears shorted
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powerboost shield 500mA appears shorted

by socrates1024 on Fri Mar 26, 2021 2:50 pm

I'm having a problem with a powerboost shield 500mA that arrived this week. Order number is 2520755-0759996712

After using it just fine for 20 minutes or so, it stopped working. It behaves exactly the same way as reported in this forum post viewtopic.php?f=31&t=174843&p=852912&hilit=powerboost#p852912 ....
basically when powered by microUSB the charging light is on but otherwise no functionality. Based on the discussion in the linked post above, I confirmed with a continuity checker there's a short across VBat and Gnd. I don't see any reason my downstream project (I stacked it with a servo shield and a metro from this order) would have caused this.

Attaching photos of my soldering
Attachments
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PXL_20210326_181216955.jpg (73.82 KiB) Viewed 180 times
PXL_20210326_181224092.jpg
PXL_20210326_181224092.jpg (75.09 KiB) Viewed 180 times

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Re: powerboost shield 500mA appears shorted

by franklin97355 on Wed Apr 07, 2021 4:12 pm

Soldering looks good. What battery do you use and, if it was not an Adafruit product did you confirm the polarity?

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Re: powerboost shield 500mA appears shorted

by socrates1024 on Fri Apr 09, 2021 10:45 am

Thanks for the reply - I only used the 1200mah 3.7v battery that came with the powerboost shield

Image

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Re: powerboost shield 500mA appears shorted

by franklin97355 on Wed Apr 21, 2021 2:54 pm

Sorry for the delay. Contact support@adafruit.com and we can replace the shield to see if it is actually shorted.

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Re: powerboost shield 500mA appears shorted

by socrates1024 on Fri May 07, 2021 4:35 pm

The replacement powerboost shield did the exact same thing after attaching it to an adafruit metro.
I observed that it was making a humming/whining sound while running on the battery prior to the light going off and then acting as described above. I don't know if that gives a hint as to what could be going wrong?

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Please be positive and constructive with your questions and comments.