The voltage of a lithium polymer (LiPo) battery is not determined by its capacity (measured in milliampere-hours, mAh) but by its cell configuration and chemistry. Here’s how it generally works:

Standard LiPo Battery Voltages:

1. Single Cell (1S) LiPo Battery:
   • Nominal Voltage: 3.7 volts
   • Fully Charged Voltage: 4.2 volts
   • Discharged Voltage: Approximately 3.0 volts (minimum recommended)
2. Multiple Cells (e.g., 2S, 3S) LiPo Battery:
   • 2S (Two Cells in Series):
     • Nominal Voltage: 7.4 volts (3.7V per cell x 2)
     • Fully Charged Voltage: 8.4 volts (4.2V per cell x 2)
   • 3S (Three Cells in Series):
     • Nominal Voltage: 11.1 volts (3.7V per cell x 3)
     • Fully Charged Voltage: 12.6 volts (4.2V per cell x 3)

80mAh Capacity Battery:

• Capacity (80mAh): This indicates how much charge the battery can hold and does not affect the voltage. For an 80mAh LiPo battery, the voltage would be the same as that of a typical single-cell LiPo battery if it’s a 1S battery. Thus:
  • Nominal Voltage: 3.7 volts
  • Fully Charged Voltage: 4.2 volts

To Determine the Voltage:

• Check the Battery Label: The battery’s label or datasheet should specify its nominal and fully charged voltages.
• Battery Configuration: Identify if the battery is a single cell or multiple cells in series to know the exact voltage.

Summary:

• Single Cell LiPo Battery (1S): 3.7V nominal, 4.2V fully charged
• Voltage Determination: Capacity (80mAh) does not affect voltage; check the battery’s specifications for voltage details.

If you have an 80mAh LiPo battery and it’s a standard single-cell configuration, its nominal voltage would be 3.7 volts.