Products > Test Equipment
Test coin batteries
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BILLPOD:
Good Morning Swiss, welcome to the forum :popcorn:
Psi:
These are ok for a quick test of a cell to ensure it's good before installing in a product.
https://www.ztsinc.com/mbt1.html
Psi:

--- Quote from: swiss on November 09, 2023, 06:20:40 am ---We currently suspect that some of the cr2032 button batteries we receive do not meet the specifications.

--- End quote ---

One thing that cause problems in production with CR2032 is people not knowing how to handle/store them.

Production Operator: "It takes too long to pick them up from the plastic tray each time, so I dump them into a loose pile, then I can work faster"   :palm:
bateau020:

--- Quote from: Fungus on November 09, 2023, 07:21:52 am ---An Arduino and a 10k load resistor...?

--- End quote ---

Indeed, something like that. Although I built mine for Li-Ion cells, I also often use it on coin cells. See https://github.com/hb020/batterymeter
ebastler:

--- Quote from: tszaboo on November 09, 2023, 11:17:33 am ---Well let's say a CR2032 coin cell is 200mAh, you don't want to test a battery for a thousand hours, you would set up like 2-10mA discharge current.

--- End quote ---

If the goal is to check whether the supplied batteries meet specifications (as stated by the OP), I would test them under the conditions the manufacturer has specified. For the Energizer CR2032, that would be a 15 kOhm load, resulting in approx. 50 days of discharge time: https://data.energizer.com/pdfs/cr2032.pdf

So I think one feature of a practical tester for incoming inspection would be the ability to test a small batch of batteries in parallel. The "Arduino ADC with load resistor" solution doesn't look too bad...

The spec I would be more worried about (if this is for an application like a pocket calculator) is self discharge, by the way. About 1% per year is the spec, and I don't see a solution to accelerate the test. On the other hand, no dedicated tester required -- just put a few batteries into the drawer and take them out once a month for a brief measurement.
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