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Bought from Canadian Tire, better than many other cheap battery testers as it includes a dummy load.
The back of the box has more information than the instructions!
An example marginal battery on another cheap tester that (probably) doesn’t have a dummy load. It registers as marginal-good:
On the tester with a dummy load appropriate for an AA cell. Shows as more marginal:
Switching to a dummy load for a C cell. Shows as bad.
The load is probably too low to be really indicative, but it’s better than a straight volt meter.
- Pololu Blog » Engage Your Brain »
Understanding battery capacity: Ah is not A
- Various (mostly introductory?) articles about different battery types, uses, care for, etc - https://batteryspecialists.com.au/blogs/news
Moved to EDA/ECAD Reference.
Germanium diodes, like the IN34(A), are becoming rare. They are often cited as the heart of AM crystal (ie battery-less) radios.
Potential alternatives include BAT-46 Schottky diodes, or utilizing (J)FET junctions- eg http://iq-technologies.net/projects/rf/029/index.html.