Electronics > Projects, Designs, and Technical Stuff
Alkaline battery tester
rdl:
LCD panel meters can run a long time from a 9 volt battery as long as there's no backlight on all the time.
6PTsocket:
The apprropriate test load really depends on the application. A battery can have high internal resustance and still run a device that draws very little current. Any tester that has load resistors estimates what they consider a typical load.
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floobydust:
I use an old analog Radio Shack Micronta 22-032 battery tester. The pass/fail voltages are in this table.
It uses 10R load for 1.5V 150ma, 30R load for 1.5V 50ma.
yo0:
--- Quote from: sasa on August 07, 2017, 03:02:38 pm ---Calculating internal battery resistance will give a bit more reliable info of the status and future life of the battery.
For a bit more concrete info:
https://learn.sparkfun.com/tutorials/measuring-internal-resistance-of-batteries
--- End quote ---
you can test batteries with a esr meter, "blue esr meter" is a good one for that.
--- Quote --- Do you know that those bad batteries were measured good using the analog or even with a digital multimeter? The battery voltage drop the moment you connect it with a load. With the ESR meter, you don’t need to connect the battery to a load and you will know how good is the battery by just observing the ESR ohm test result. If you are not sure of the good ESR ohm value for a particular battery, you can always compare it with a good one or you can even draw up your own ESR meter chart for battery if you have the time.
--- End quote ---
best regards
Pio
OldEE:
The best battery tester I've found is from ZTS and uses a pulse load. The mini version that I have is $45 and it also does NiMh and lithium.
Check out the patent for more information. https://patents.google.com/patent/US6823274B2/en
Larry
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