Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Potentiometer

Potentiometer

Voltage and current measurements using a standard voltmeter and ammeter alter the circuit being measured either by drawing or resisting the current flow, which introduces uncertainties in the measurements. Null measurements balance the voltages so that no current flows through the measuring device and, therefore, no alterations occur in the measured circuit.
Suppose the emf of a battery needs to be measured. If the battery is directly connected to a standard voltmeter, the measured quantity is...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Determination of the Enthalpies of Combustion and Formation of Substituted Triazines in an Adiabatic Rotating Bomb Calorimeter.

Journal of research of the National Bureau of Standards (1977)·2021

Same author

Heat of Formation of <i>N</i>-Dimethylaminodiborane.

Journal of research of the National Bureau of Standards. Section A, Physics and chemistry·2020

Same author

Heats of Hydrolysis and Formation of Dimethoxychloroborane.

Journal of research of the National Bureau of Standards. Section A, Physics and chemistry·2020

Same author

Heat of Combustion of Borazine, B<sub>3</sub>N<sub>3</sub>H<sub>6</sub>.

Journal of research of the National Bureau of Standards. Section A, Physics and chemistry·2020

Same author

Heats of Hydrolysis and Formation of Potassium Borohydride.

Journal of research of the National Bureau of Standards. Section A, Physics and chemistry·2020

Same author

Heats of Combustion and Formation of Trimethylborane, Triethylborane, and Tri-<i>n</i>-butylborane.

Journal of research of the National Bureau of Standards. Section A, Physics and chemistry·2020

Search research articles

Related Experiment Video

Updated: Oct 19, 2025

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway

Published on: March 7, 2022

A Microcalorimeter for Measuring Self-Discharge of Pacemakers and Pacemaker Power Cells.

Edward J Prosen¹, Jennifer C Colbert¹

¹National Bureau of Standards, Washington, D. C. 20234.

Journal of Research of the National Bureau of Standards (1977)

|September 27, 2021

Summary

This study investigated heat loss in cardiac pacemaker batteries using microcalorimetry. Understanding self-discharge mechanisms in alkaline, mercury, and lithium-iodine cells is crucial for pacemaker longevity.

Keywords:

Battery microcalorimeter pacemaker power cell self-discharge

More Related Videos

Calorespirometry: A Powerful, Noninvasive Approach to Investigate Cellular Energy Metabolism

Calorespirometry: A Powerful, Noninvasive Approach to Investigate Cellular Energy Metabolism

Published on: May 31, 2018

Multi-analyte Biochip MAB Based on All-solid-state Ion-selective Electrodes ASSISE for Physiological Research

Multi-analyte Biochip MAB Based on All-solid-state Ion-selective Electrodes ASSISE for Physiological Research

Published on: April 18, 2013

Related Experiment Videos

Last Updated: Oct 19, 2025

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway

Published on: March 7, 2022

Calorespirometry: A Powerful, Noninvasive Approach to Investigate Cellular Energy Metabolism

Calorespirometry: A Powerful, Noninvasive Approach to Investigate Cellular Energy Metabolism

Published on: May 31, 2018

Multi-analyte Biochip MAB Based on All-solid-state Ion-selective Electrodes ASSISE for Physiological Research

Multi-analyte Biochip MAB Based on All-solid-state Ion-selective Electrodes ASSISE for Physiological Research

Published on: April 18, 2013

Area of Science:

Biomedical Engineering
Materials Science
Electrochemistry

Background:

Cardiac pacemakers rely on long-lasting power sources.
Understanding battery self-discharge is critical for predicting pacemaker lifespan and reliability.
Heat generation during self-discharge can impact battery performance and safety.

Purpose of the Study:

To investigate the self-discharge heat losses in cardiac pacemaker power cells and complete pacemakers.
To monitor heat loss characteristics of various battery chemistries under different conditions.
To gather information on the underlying self-discharge mechanisms.

Main Methods:

Microcalorimetry was employed to measure heat losses.
Experiments were conducted on small alkaline, mercury, and lithium-iodine batteries.
Measurements were performed under both open-circuit and external load conditions.

Main Results:

Heat loss characteristics of different battery types were determined.
Data on self-discharge mechanisms were collected for alkaline, mercury, and lithium-iodine batteries.
Heat loss data from complete pacemakers were also analyzed.

Conclusions:

Microcalorimetry provides valuable insights into pacemaker battery self-discharge.
Understanding heat loss is essential for optimizing pacemaker power cell design and longevity.
The study contributes to the knowledge of battery performance in critical medical devices.