ITTSB.EU Blog Forum
AC or DC Electrical Energy related topics => Power supply / Battery Chargers => Topic started by: Kiriakos GR on August 23, 2025, 09:07:35 PM
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I do own several 9V NIMH battery cells, of different age.
Neither at the year 2025, no one of the Asian battery charger makers, him came with a product (NIMH charger), which that will offer battery capacity test automation for the 9V NIMH.
Back in time, I did a product review about alkaline battery cells, and I was have to make a peculiar load tester especially for 9V cells.
This be able to offer adjustable range from 10 ~ 230 mA.
Nowadays, my FLUKE 8846A, this is capable to measure simultaneously voltage and current, and with TsDMMViewer I can see both graphs at my computer screen.
The only information that I has missing, this was 9V discharge rates table this be converted in mA.
As reference it is taken specifications of:
Capacity :300mAh
Nominal voltage: 8.4v
Discharge Cut-off voltage 7V
1C = 300mA
0.5C = 150mA
0.4 = 120
0.3 = 90
0.2 = 60
0.1C = 30mA
Since 2012, any reliable testing report of 9V NIMH, this includes capacity estimate according discharge rate at 0.2C ;)
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9V 250mAh table:
1C = 250mA
0.5C = 125
0.4 = 100
0.3 = 75
0.2 = 50
0.1C = 25mA
9V 200mAh table:
1C = 200mA
0.5C = 100
0.4 = 80
0.3 = 60
0.2 = 40
0.1C = 20mA
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I think that this topic it should pointing at newest Kiriakos upcoming project. ;)
TEC-06 Battery Capacity Tester 16W Electronic Load for 9V Block NIMH Evaluation
https://www.ittsb.eu/forum/index.php?topic=2115.0 (https://www.ittsb.eu/forum/index.php?topic=2115.0)