Battery testing

I am working on an electric scooter. I have two new 12v batteries, individually they test fine. When I test them together at the connection, I only get 5 volts? When I first hooked them up and turned the scooter on the reset button popped out. I reset and it does it again? So I don't know if this was the cause of the battery issue? Thanks

by RussR011
December 23, 2018

Series? Parallel? Polarity? Circuit?

by mikerogerswsm
December 23, 2018

Can you describe what you mean by, "I test them together at the connection." What exactly does that mean. It seems obvious that you have hooked them up wrong or the reset button wouldn't have popped out. You should provide a schematic and be more detailed. For example, what reset button. Where is it on your scooter. Is that "reset button" really a circuit breaker. You are probably not using the right word or that "reset button." It's probably a circuit breaker and by pushing the button you are resetting the breaker.

by frequencydrive
January 17, 2019
Add comment...

Please sign in or create an account to comment.


1 Answer

Answer by wangwg88

one possible reason: one battery is good, another one is bad though the bad one checked by meter is 12v.

+1 vote
by wangwg88
February 01, 2019
Add comment...

Please sign in or create an account to comment.


Your Answer

You must log in or create an account (free!) to answer a question.

Log in Create an account


Go Ad-Free. Activate your CircuitLab membership. No more ads. Save unlimited circuits. Run unlimited simulations.

Search Questions & Answers


Ask a Question

Anyone can ask a question.

Did you already search (see above) to see if a similar question has already been answered? If you can't find the answer, you may ask a question.


About This Site

CircuitLab's Q&A site is a FREE questions and answers forum for electronics and electrical engineering students, hobbyists, and professionals.

We encourage you to use our built-in schematic & simulation software to add more detail to your questions and answers.

Acceptable Questions:

  • Concept or theory questions
  • Practical engineering questions
  • “Homework” questions
  • Software/hardware intersection
  • Best practices
  • Design choices & component selection
  • Troubleshooting

Unacceptable Questions:

  • Non-English language content
  • Non-question discussion
  • Non-electronics questions
  • Vendor-specific topics
  • Pure software questions
  • CircuitLab software support

Please respect that there are both seasoned experts and total newbies here: please be nice, be constructive, and be specific!

About CircuitLab

CircuitLab is an in-browser schematic capture and circuit simulation software tool to help you rapidly design and analyze analog and digital electronics systems.