# State of Charge in battery shield reporting 255?

**URL:** <https://community.particle.io/t/state-of-charge-in-battery-shield-reporting-255/19971>\
**Category:** Troubleshooting\
**Created:** [February 11, 2016, 7:44pm UTC](https://community.particle.io/t/state-of-charge-in-battery-shield-reporting-255/19971 "2016-02-11T19:44:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![kareem613](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/kareem613/32/1931_2.png) [@kareem613](https://community.particle.io/u/kareem613)\
**Post date:** [February 11, 2016, 7:44pm UTC](https://community.particle.io/t/state-of-charge-in-battery-shield-reporting-255/19971/1 "2016-02-11T19:44:45Z")

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I’ve got the battery shield hooked up and I’m trying to monitor the state of charge. I understand it’s supposed to be a value from 0-100.

It all seems to work just fine until a point where it jumps to 255 and stays there until I reset the photon. I don’t even have to unplug power. The red led onboard indicating full charge doesn’t come on either. I suspect the issue is firmware related.  
Here’s the graph showing the jump.  
[http://atomiot.com/Graph/Details/fcdc8cf8-ec19-424c-b583-ed0f844719ba](http://atomiot.com/Graph/Details/fcdc8cf8-ec19-424c-b583-ed0f844719ba)

This thread discusses the same issue but with the sparkfun battery shield. It appears to have been resolved with a firmware update to 4.4. I’m on 4.9 now.

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**Author:** ![bjagpal](https://avatars.discourse-cdn.com/v4/letter/b/e95f7d/32.png) [@bjagpal](https://community.particle.io/u/bjagpal)\
**Post date:** [February 15, 2017, 8:45pm UTC](https://community.particle.io/t/state-of-charge-in-battery-shield-reporting-255/19971/2 "2017-02-15T20:45:38Z")

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Did you ever get an answer to this? I’m getting a voltage of 5 and an SoC reading of 255…

Thanks.