Battery Voltage Calculator

Calculate battery pack voltage, capacity, and runtime for series, parallel, and series-parallel configurations. Design optimal battery systems for your applications.

Battery Configurations

Series Configuration

[+|-] โ”€โ”€โ”€โ”€ [+|-] โ”€โ”€โ”€โ”€ [+|-]
Vโ‚ + Vโ‚‚ + Vโ‚ƒ = Vtotal
Same capacity

Parallel Configuration

[+|-] โ”ฌโ”€โ”€โ”€ [+|-] โ”ฌโ”€โ”€โ”€ [+|-]
      โ”‚          โ”‚
      โ””โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ดโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€
Same voltage, Cโ‚ + Cโ‚‚ + Cโ‚ƒ

Battery Configuration

Battery Specifications

About Battery Configurations

Understanding battery configurations is crucial for designing power systems. Different configurations provide different voltage and capacity characteristics.

Configuration Types:

  • Series: Increases voltage, maintains capacity
  • Parallel: Maintains voltage, increases capacity
  • Series-Parallel: Increases both voltage and capacity

Common Battery Types:

  • AA Alkaline: 1.5V, 2.5Ah
  • 18650 Li-ion: 3.7V, 2.5-3.5Ah
  • Lead Acid: 2V per cell, various capacities
  • LiFePO4: 3.2V per cell, long life

Design Considerations:

  • Voltage requirements of the load
  • Current capacity needed
  • Runtime requirements
  • Physical size and weight constraints
  • Cost and availability