Crystal Cell Research for Experimenter

[tgraca]

So... I have seen this a lot with these last 3 cells. The voltage goes down fairly quick under load. After 2.5 hours, it went from 1,300 mV down to 940 mV.... I reconnected the meter to test draw (load) and the JT circuit was pulling 1.42 mV, which is fairly high for this circuit... Then I disconnected the battery completely and shorted the battery to find over 130 mA... after several minutes, it was up and down, but settled at around 110 mA, which is really high for a battery like this.... so... it has low internal resistance (bad), but high amperage on short (excellent)... I am not sure what to make of this... The real test is time... the good thing about the JT circuits I build is that they work well down to about 800 mV, but this one will work well down to less than 600 mV... we'll see over the long term....

After a few more minutes while the battery recovered from the short, the battery was showing 1240 mV, and when I connected it back up to the JT circuit, it dropped to 840 mV, but is still climbing. We'll see how many days it can hang out above 800 mV... I'll report back...

[plengo]

... it has low internal resistance (bad), but high amperage on short (excellent)....

low resistance being bad?? I thought lower the resistance better. Lead acid batteries are lower than 1 ohm. Lower resistance would mean that the current going THROUGH the battery will not be wasted in heat.


Please correct me.


Fausto.

[plengo]

Is 358 first and 2 with F149 zapped?


Fausto.

[tgraca]

Is 358 first and 2 with F149 zapped? - Fausto.

Yes. Your exact formula. 2 to 1 to 1... flooded though... I will add a bunch of coffee filter, wet it down and add hydrate #5 next time...
We will truly test this... I added a bunch of notes in my posts about issues with the builds you suggested and what I plan to do...
not sure if you read them... look above...

[plengo]

Yes. Your exact formula. 2 to 1 to 1... flooded though... I will add a bunch of coffee filter, wet it down and add hydrate #5 next time...
We will truly test this... I added a bunch of notes in my posts about issues with the builds you suggested and what I plan to do...
not sure if you read them... look above...

Great. I do read everything but sometimes I still miss info. Updated the sheet. I will try to put this sheet on the first post for progress log.

Fausto.