Battery testers

Definition

Battery testers are devices used to measure the state of charge, voltage, and overall health of a battery. They help determine whether a battery can still effectively provide electromotive force (EMF) in circuits.

5 Must Know Facts For Your Next Test

1. A battery tester measures the voltage across the terminals to assess the state of charge.
2. Most battery testers work by applying a load and measuring the response, which helps indicate internal resistance.
3. Battery testers are crucial for maintaining direct-current (DC) circuits by ensuring batteries can supply consistent EMF.
4. The readings from a battery tester can help predict battery lifespan and identify when replacements are necessary.
5. Advanced battery testers may also provide information on capacity, enabling more detailed analysis of performance.

Review Questions

• What primary parameters do battery testers measure?
• How do battery testers contribute to maintaining effective DC circuits?
• Why is it important to know the internal resistance of a battery?

Related terms

Voltage: The electrical potential difference between two points in a circuit, measured in volts (V).

Electromotive Force (EMF): The energy per unit charge provided by an energy source, such as a battery or generator, measured in volts.

Internal Resistance: The resistance within a battery that causes a drop in voltage when current flows, affecting performance and efficiency.