- #1
damosuz
- 72
- 0
When I connect a AA rechargeable battery directly to a voltmeter, voltage increases slowly, regardless of the way I connect it. I can't figure out why.
Battery voltage increases when voltmeter connected
Click For Summary
SUMMARY
The discussion centers on the phenomenon where connecting a AA rechargeable battery to a voltmeter results in a gradual increase in voltage readings. Participants noted that this could occur due to a failing voltmeter battery, which can affect measurement accuracy. Additionally, it was mentioned that external factors, such as heat from a person's hand, can enhance the chemical reactions within the battery, leading to temporary voltage increases. Ultimately, ensuring the voltmeter is functioning properly is crucial for accurate voltage readings.
PREREQUISITES- Understanding of basic electrical concepts, including voltage and battery chemistry.
- Familiarity with digital voltmeters (DVM) and their operation.
- Knowledge of rechargeable battery types, specifically AA batteries.
- Awareness of factors affecting battery performance and measurement accuracy.
- Investigate the effects of temperature on battery performance and voltage readings.
- Learn about common issues with digital voltmeters and how to troubleshoot them.
- Research the chemical processes in rechargeable batteries that affect voltage output.
- Explore best practices for measuring battery voltage accurately using a DVM.
Electronics enthusiasts, electrical engineers, and anyone involved in battery testing or troubleshooting voltmeter issues will benefit from this discussion.
- #2
berkeman
Admin
- 69,311
- 24,567
Increases from what to what? And what do you mean by "regardless of the way I connect it"? There aren't that many ways to connect a DVM to a battery...damosuz said:
- #3
OmCheeto
Gold Member
- 2,494
- 3,470
This happened to me last year when I was measuring the voltage on a car battery.damosuz said:
It turned out the battery in my voltmeter was going dead.
Replacing the battery in the voltmeter made the problem go away.
- #4
CWatters
Science Advisor
Homework Helper
Gold Member
- 10,546
- 2,324
Sometimes the heat from your hand is enough to boost the chemical reaction in the battery increasing the voltage.
- #5
Averagesupernova
Science Advisor
Gold Member
- 4,851
- 1,520
Correctly anyway. I wondered the same thing.berkeman said:Increases from what to what? And what do you mean by "regardless of the way I connect it"? There aren't that many ways to connect a DVM to a battery...
Similar threads
- · Replies 13 ·
- · Replies 5 ·
- · Replies 3 ·
- · Replies 19 ·
- · Replies 21 ·
- · Replies 11 ·
High School
The voltage between two points
- · Replies 11 ·
- · Replies 7 ·