Internal resistance is the opposition to current flow within a battery cell or battery pack.
Glossary: Internal Resistance
Expanded Explanation
Internal resistance causes voltage drop and heat generation when a battery is delivering power. As batteries age or operate under high loads, internal resistance increases, reducing efficiency and available power. Monitoring internal resistance helps assess battery condition and performance limitations.Why it matters
Higher internal resistance reduces runtime and can increase heat generation.iTECH Context
iTECH evaluates internal resistance when selecting cells and designing power systems.Applications
High-power devices, medical equipment, industrial battery systemsRelated Terms
State of Health, Battery Degradation, Thermal Management