How to Calculate Battery Life in mAh

Written by christopher hanson
  • Share
  • Tweet
  • Share
  • Pin
  • Email
How to Calculate Battery Life in mAh
A set of equations can be used to determine the life of a battery in mAh. (D-BASE/Digital Vision/Getty Images)

Most battery lifespans are rated based on mAh (milliamp hours). Certain brands, such as Sony, use different protocols to rate the predicted lifetime of their batteries. In some cases, no lifespan is rated at all. In such cases, mathematical equations can be used to convert between the various electrical components -- such as current, resistance and voltage -- to come up with the actual lifespan of the battery. Most batteries will print some combination of the voltage, amperage, and wattage of the battery.

Skill level:
Moderately Easy

Other People Are Reading

Instructions

  1. 1

    Write down the number of watt hours and volts listed on the battery. It is useful to write "Wh =" then the number of watt hours then "V =" and the number of volts. This will help keep the notes clear.

  2. 2

    Multiply the number of watt hours by the number of volts. The product will be the number of Amp hours (Ah).

  3. 3

    Multiply the number of Amp hours by 1000 to get the number of mAh (milliamp hours).

Don't Miss

Filter:
  • All types
  • Articles
  • Slideshows
  • Videos
Sort:
  • Most relevant
  • Most popular
  • Most recent

No articles available

No slideshows available

No videos available

By using the eHow.co.uk site, you consent to the use of cookies. For more information, please see our Cookie policy.