Battery Charging Time Calculator and Formula

This document explains how to calculate battery charging time using a simple formula and provides a handy calculator. The calculator takes two key inputs: battery capacity (measured in mAh) and charging current (measured in mA) to determine the estimated charging time in hours.

Battery Charging Time Calculator

The calculator uses the following inputs:

• Battery Capacity (mAh): The amount of electrical charge the battery can store.
• Charging Current (mA): The rate at which the battery is being charged.

Example:

• INPUTS:
  • Battery Capacity (mAh) = 1200
  • Charging Current (mA) = 120
• OUTPUT:
  • Battery Charging Time = 10 Hours

Battery Charging Time Formula

Generally, a battery can be safely charged with a current approximately 10% of its total capacity. The following formula is used to calculate the estimated battery charging time:

Formula:

Charging Time (Hours) = Battery Capacity (mAh) / Charging Current (mA)