Read an 80V battery using its own voltage range. A percentage display is only an indication; pack voltage, cell group readings, load, and temperature provide the context needed to understand it.
Battery and Cell Voltage Chart
The amount of time a battery cell stays above 4.2V or below 2.5V is critical. A few seconds might be tolerable, but staying in those ranges for minutes or hours significantly increases the risk of thermal runaway above 4.2V or permanent cell damage below 2.5V.
| Cell Volts | Description |
|---|---|
| 4.50v | Thermal Runaway Risk |
| 4.45v | Thermal Runaway Risk |
| 4.40v | Thermal Runaway Risk |
| 4.35v | Thermal Runaway Risk |
| 4.30v | Thermal Runaway Risk |
| 4.25v | Overcharge / Degradation |
| 4.20v | 100% (Full Charge) |
| 4.15v | Near Full (Common BMS Limit) |
| 4.10v | |
| 4.05v | |
| 4.00v | High State of Charge |
| 3.95v | |
| 3.90v | ~75% |
| 3.85v | |
| 3.80v | |
| 3.75v | |
| 3.70v | Nominal Voltage |
| 3.65v | Nominal Voltage |
| 3.625v | ~50% |
| 3.60v | |
| 3.55v | |
| 3.50v | |
| 3.45v | |
| 3.40v | |
| 3.35v | |
| 3.30v | ~25% |
| 3.25v | |
| 3.20v | |
| 3.15v | |
| 3.10v | |
| 3.05v | |
| 3.00v | Typical Cutoff (Not True 0%) |
| 2.95v | |
| 2.90v | |
| 2.85v | |
| 2.80v | |
| 2.75v | |
| 2.70v | Deep Discharge (Cell Stress) |
| 2.65v | |
| 2.60v | |
| 2.55v | |
| 2.50v | Minimum (Damage Threshold) |
This chart is best used as a reference guide. Resting voltage, loaded voltage, BMS tuning, and battery chemistry can shift where these thresholds appear in real-world use.
Battery Operating Range
| Platform | Full Voltage | Empty Voltage | Storage Voltage | Max Regen |
|---|---|---|---|---|
| 80V | 91-92 V | 66 V | 80-87 V | 40 A |
Empty voltage and regen behavior vary under load, temperature, and controller settings. These values are best treated as reference ranges, not fixed under-throttle readings.
ONYX 80V 45Ah Reading Battery Level
| Voltage | State |
|---|---|
| 92.4 V | Full |
| 80 V | ~50% |
| 66 V | Empty |
ONYX 80V 45Ah Battery and Cell Voltage Chart
| Battery V | Cell V | Description |
|---|---|---|
| 99V | 4.50V | Thermal runaway risk |
| 97V | 4.40V | Thermal runaway risk |
| 94V | 4.25V | Rapid degradation |
| 92.4V | 4.20V | True 100% |
| 91V | 4.15V | Stock “100%” |
| 88V | 4.00V | ~80% |
| 82V | 3.70V | Storage level |
| 80V | 3.63V | ~50% |
| 72V | 3.30V | ~25% |
| 66V | 3.00V | Empty |
| 55V | 2.50V | Minimum |
| <55V | <2.50V | Damage occurs |