ARRL

Forum Home - Rules - Help - Login - Forgot Password
Members can access, post and reply to the forums below. Before you do, please first read the RULES.

Battery testing meter

Sep 15th 2011, 06:34

K8JP

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
I remember a discussion about checking batteries, like AAA, AA, 9V, etc. With a Hi-Z meter, there is no loading of the battery. To check the like batteries, there were suggested load resistances for the typical cells and then you could use a Hi-Z digital meter to have a fair evaluation of the battery being measured. I can not seem to find those suggested values anywhere.
Sep 15th 2011, 16:13

W1VT

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0

ZTS sells a patented pulse battery tester.

The patent application lists the actual resistances they use in their prototype.

http://www.freepatentsonline.com/6823274.html

Zack Lau W1VT
ARRL Senior Lab Engineer

Sep 16th 2011, 04:10

AA6E

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
My cheap VOM has a battery test option for that measures voltage under load for 1.5 and 9 V batteries. I measured the loads they use: 43 ohms (1.5V) and 2.2 K (9V). This corresponds to 52 or 36 mW power drain, respectively. Your mileage may vary!

73 Martin AA6E
ARRL Technical Advisor
Sep 16th 2011, 08:42

K8JP

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
Yes, Martin. There are cheap "Just battery checker" meters that put a small load on the battery being tested. If I put the same load on these batteries, I can use my DVM to quickly get an approximate heath of a battery, but I did not remember what those load values were. You put me in the ball park. Cheers, Joe, V31JP/K8JP.

Back to Top