{{Short description|Electronic device intended for testing the state of an electric battery,}} thumb|Battery tester
A '''battery tester''' is an electronic device intended for testing the state of an electric battery, going from a simple device for testing the charge actually present in the cells and/or its voltage output, to a more comprehensive testing of the battery's condition, namely its capacity for accumulating charge and any possible flaws affecting the battery's performance and security.
== Simple battery testers == The most simple battery tester is a DC ammeter, that indicates the battery's charge rate.<ref>[https://books.google.com/books?id=TmlfcizaTE0C&dq=battery+tester&pg=RA1-PA51 Classroom Manual – Ken Pickerill – Google Books<!-- Bot generated title -->]</ref> DC voltmeters can be used to estimate the charge rate of a battery, provided that its nominal voltage is known.<ref>[https://books.google.com/books?id=LmIjpZLQQUEC&dq=battery+tester&pg=PA110 Popular Photography – Google Books<!-- Bot generated title -->]</ref>
== Integrated battery testers == There are many types of integrated battery testers, each one corresponding to a specific condition testing procedure, according to the type of battery being tested, such as the “421” test for lead-acid vehicle batteries.<ref>[http://www.amperis.com/en/resources/articles/meters-battery-testers/ Meters and battery testers | Amperis - Tests & measurement electrical instruments<!-- Bot generated title -->]</ref> Their common principle is based on the empirical fact that after having applied a given current for a given number of seconds to the battery, the resulting voltage output is related to the battery's overall condition, when compared to a healthy battery's output.<ref>[https://books.google.com/books?id=B5UB34Dm3P0C&dq=battery+tester&pg=PA36 Classic Car Electrics: Tips, Techniques and Step-by-Step Repair, Restoration ... - Martin Thaddeus - Google Books<!-- Bot generated title -->]</ref>
== References == {{reflist}}
== External links == {{commons category multi|Battery testers}} *[https://books.google.com/books?id=6dukgCogOTQC&dq=battery+tester&pg=PA348 Power Equipment Engine Technology] By Edward Abdo *[https://books.google.com/books?id=0T30OyFiNKQC&dq=battery+tester&pg=PA521 Automotive Technology: A Systems Approach] By Jack Erjavec *[https://books.google.com/books?id=uxVEzmpzGMsC&dq=battery+tester&pg=PA1 Wharton on Dynamic Competitive Strategy] edited by George S. Day, David J. Reibstein *[https://books.google.com/books?id=we7-hg9YGbgC&dq=battery+tester&pg=PA59 The Entrepreneurial Mindset] By Rita Gunther McGrath, Ian C. MacMillan Harvard Business Press, 2000
Category:Electrical equipment Tester