The voltage of a 9V battery when full depends on its type, specifically whether it is non-rechargeable or rechargeable.
Understanding 9V Battery Voltage
While labeled "9V," this indicates the nominal voltage, which is an average voltage during discharge or a specific target voltage for regulation. The actual voltage when a battery is fully charged or brand new can differ significantly based on its internal chemistry.
According to EBL, a manufacturer of batteries:
- Non-rechargeable batteries, such as alkaline 9V batteries, typically have a voltage above 9V when fully charged or new.
- Rechargeable batteries, like lithium 9V batteries (specifically the EBL 9V lithium mentioned), have a lower voltage range of between 8.2V to 8.4V when fully charged.
This distinction is crucial for devices that are sensitive to voltage levels.
Voltage Comparison by Battery Type
Here's a simple comparison based on the reference:
| Battery Type | Chemistry Example (from reference) | Typical Full Voltage |
|---|---|---|
| Non-Rechargeable | Alkaline | Above 9V |
| Rechargeable | Lithium | 8.2V to 8.4V |
Understanding these differences helps in choosing the right battery for your device and interpreting voltage readings. A brand new alkaline 9V battery might read 9.5V or higher, while a fully charged rechargeable lithium 9V might read closer to 8.4V. Both are considered "full" for their respective types.
For more details on 9V batteries and common questions, you can refer to sources like the EBL Official blog.
