Electronic – Internal resistance of batteries


In one of the answers on this site, I found link to this project. That article mentions internal resistance of batteries and cells. Where can I find data about common ranges of internal resistances for batteries? I've always heard that it's low, but I couldn't find anywhere how low is low and common resistances for common battery types.

Best Answer

The datasheets.

For example, here is the datasheet for Duracell Plus AA (retail) batteries: http://www.farnell.com/datasheets/97133.pdf

If you do some searching around on the websites of Duracell, Energizer and the like you can often find these datasheets, though they are hidden away. I found this on Farnell's website.

First page, table 1: "Nominal Internal Impedence" - 181mohm @ 1kHz.