# State of Charge Values

**URL:** <https://community.particle.io/t/state-of-charge-values/48860>\
**Category:** Troubleshooting\
**Created:** [April 2, 2019, 1:50pm UTC](https://community.particle.io/t/state-of-charge-values/48860 "2019-04-02T13:50:01Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![Rftop](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/rftop/32/16896_2.png) [@Rftop](https://community.particle.io/u/Rftop)\
**Post date:** [April 2, 2019, 4:51pm UTC](https://community.particle.io/t/state-of-charge-values/48860/7 "2019-04-02T16:51:11Z")

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I believe the Device Vitals assume that the default Li-Po termination voltage of 4.112 V is used.  
The Fuel Gauge reports the actual SOC depending on the voltage when sampled.

Here’s an example for a Boron being recharged by a small Solar Panel this morning.  
The Boron’s PMIC setting `setChargeVoltage(4208)` is used, instead of the 4.112 V (default).  
Note: be sure to monitor the enclosure temperature when charging to 4.208 V.

Fuel Gauge reports 92% SOC @ 4.14V. This is the actual condition, regardless of the charge termination voltage.  
 ![image](https://us1.discourse-cdn.com/flex026/uploads/particle/original/3X/1/e/1e7a891d3c208fe6e9433c7976f1ca5efd6cf612.png)

Device Vitals reports 100% SOC (since it’s higher than 4.112V default), but it also shows as “Charging” since that’s indeed what’s happening to reach the 4.208 charge Voltage.  
 ![image](https://us1.discourse-cdn.com/flex026/uploads/particle/original/3X/8/e/8e14b4d4053948b9543678435bf71297fa63fa27.png)

The Fuel Gauge will give you the best answer. It’s the percentage remaining of the Li-Po’s actual capacity.  
That’s why Fuel Gauge reports ~85’ish % when “fully” charged to the 4.112 V (default), because the Li-Po isn’t actually “full”…for safety reasons.

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