Guppy Bluetooth® Remaining Battery Capacity Estimate
Written by Matthew Clark-Massera
Updated at April 28th, 2025
The Guppy Bluetooth® will report battery voltage as part of its payload.
This can be used to make some rough estimates of the remaining battery capacity - based on knowledge of LiFeSO2 battery chemistry.
| Voltage Range | Capacity Estimate |
| 3.20 – 3.5 V | 40% + remaining |
| 3.10 – 3.20 V | 25 – 40 % remaining |
| 3.00 – 3.10 V | 10 – 25% remaining |
| 2.80 – 3.00 V | 0 – 10% remaining |
Note:
- These groups do not imply a linear relationship in each range. The voltage should simply describe the 4 groups.
- More accurate estimations are not possible at this stage because of the battery chemistry.