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Article: Automotive Q&A.(Knight Ridder Newspapers)
- Article from:
- Knight Ridder/Tribune News Service
- Article date:
- October 5, 2001
- Author:
CopyrightCOPYRIGHT 2001 Knight-Ridder/Tribune News Service. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Q. Can you shed some light on how a battery's green eye is supposed to work? Over the years I've run into batteries that worked great, but the eye was clear, or a battery that was dead, and the eye was green. Do these things really work? Why do some batteries have them and others don't?
_Jerry Benton, Los Gatos, Calif.
A. I've also run into a few built-in battery hydrometers that didn't seem to tell the truth. Before we look at how this gadget works, let me give you a little background on automotive batteries and how a conventional hydrometer might be used.
Automotive batteries fall into two major types: low-maintenance and maintenance-free. ...