John wrote:
Can someone please tell me what equipment I need to test power tool
Milwaukee or Porter Cable Batteries? I have a 13v and an 18v battery I
would like to test.
Thanks,
John

a voltmeter does a pretty good job.

Fully charged 18 volt should read about 20 volts. It has 13 cells.
If a cell is shorted it will read below 19.

A 13 volt should read over 12 and one with a bad cell would read below 11.