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Sorry for the ambiguity of the question - I was speaking of secondary cells, like https://paleblueearth.com/ offers. Donald.

I think we're probably just seeing the op-amp's overdrive recovery behaviour.

There were no electronic components in either the AA or 9 V. I've already taken them to the electronic recycle center or I'd post photos. It's been too many years since university, but, I may well

Hello , I have designed a differentiator as shown below.The pulse in the simulation photos links below is 1ns which is 350MHz BW ,much higher then the BW of the AD8034 opamp.As you can see its

I think they they added a resistor with a diode wired backwards to the main diode that diode provided V+ They specified a 10% reverse charge Say you charge at 100mA, then you'd want to add a reverse

Wiki has an interesting article on lithium batteries, the data is somewhat at odds with the information in the book. Lithium cells/batteries is an extremely complex subject with a lot of what appear

Just to be clear about this - I wasn't talking about Chinese brands.? I was referring to American battery brands, with off-shore manufacturing. I first heard the story at a ham radio convention,

Yeah. But the last ones I bought weren't anywhere near that expensive, maybe about $2 a battery? I use them in my camera.

Link to Everready primary lithium cell data https://data.energizer.com/pdfs/lithiuml91l92_appman.pdf

Yeah. I have one meter that uses a 9V, which lasts about a year if I put an alkaline in there. A lithium will last 3-4 years, typically. I don't use that meter much lately as th

I rather doubt that. Thickness of the plates bears directly on the reserve power spec, while the number of plates bears on the CCA spec. What I was dealing with was made by Exide, not made in

Are you sure?? I never saw anything suggesting that.? I can't say for certain, but I am fairly sure they do not. I was wrong about their shelf life.? It says 20 years, not 10 or 15. Andy

I think we are getting hung up on technical definitions that were not used in the real world. A carbon-zinc is classified as a Laclanche in all my battery books. [can't add the diacritical above the

I wrote: Sorry, I take that back. It depends on which store I go to.? Where I shop most frequently, Energizer fills most of the racks.? In another, it's Duracell. But not the Eveready brand

That bit with the glow plug was back when I was in high school, *MANY* decades ago. Lithium AA cells weren't around back then... -- Member of the toughest, meanest, deadliest, most unrelenting --

Andy, The cell or battery is charged, for example, for a minute then discharged for a second and continuously repeat until charged. I have seen it apply to different cell types. Bertho From:

Now by "lithium" - do you mean the NON-rechargeable, super-long-life lithium 1.5 V cells?? The ones that cost $20 for a pack of four AA's? I use those for the outside thermometer so it won't freeze,

Interesting.? That's not what I see here.? (I stopped going to Walmart during early COVID and mostly haven't been back.)? These days I see tons of Duracell and few of others.? I'm sure each

I thought that was the key difference between Leclanche cells and regular (non-Leclanche) dry cells. Andy

The Everready >primary< AA and AAA and 9V lithiums do not have a drop down regulator. Just disassembled a dead AA and 9V. They are pricey but probably worth it for several reasons... For test gear I