Direct connection of two batteries

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SUMMARY

Connecting the positive terminal of a 5-volt battery to the positive terminal of a 10-volt battery, along with their negative terminals, creates a direct connection that can lead to dangerous outcomes. This setup allows for large currents to flow due to the low output impedance of batteries, potentially resulting in overheating, fire, or damage to the batteries. It is crucial to avoid such configurations without proper resistance or components to manage the current flow.

PREREQUISITES
  • Understanding of battery voltage and current principles
  • Knowledge of electrical circuit design
  • Familiarity with battery chemistry and safety
  • Basic concepts of impedance in electrical systems
NEXT STEPS
  • Research safe methods for connecting batteries in parallel
  • Learn about battery management systems (BMS)
  • Study the implications of low output impedance in circuits
  • Explore safety measures for handling batteries
USEFUL FOR

Electrical engineers, hobbyists working with batteries, and anyone involved in battery safety and management will benefit from this discussion.

kimmy510
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If i connect the positive terminal of a 5 volt battery to positive terminal of 10 volt battery and the negative terminals of both batteries are also connected without using any resistance or any other components in between what will happen to the two batteries?. Will the one with higher voltage discharge and the one with lower voltage charge?
 
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kimmy510 said:
If i connect the positive terminal of a 5 volt battery to positive terminal of 10 volt battery and the negative terminals of both batteries are also connected without using any resistance or any other components in between what will happen to the two batteries?. Will the one with higher voltage discharge and the one with lower voltage charge?

Please don't do that. It could result in a fire or other bad things happening.

Batteries are low output impedance voltage sources, and large currents could flow if unequal batteries were connected in parallel.

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