Battery Question

This is about as good as you'll find:

FWIW, Sony says "Recommended pulse drain: 12mA."

Best regards, James Arthur

...Jim Thompson

-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | |

| 1962 | America: Land of the Free, Because of the Brave

Cheers

"Jim Thompson" wrote in message news: snipped-for-privacy@4ax.com...

Dang it! I misread which cell he wanted...

I suggested Energizer's datasheets because they show the cell under pulsed load, which gives impedance info:

From the graph on the lower right, CR2025 is about 32 ohms.

HTH, James Arthur

JT,

its going to be Voc/Isc id pulse test it to be accurate.

Marc

I have a used CR2025. It's not completely dead, with open circuit voltage of 2.8 volts. I also have a brand new CR2016 and CR2032. The CR2016 is thinner than the CR2025 and the CR2032 is thicker than the CR2025. I measured the impedances of all three and got these results:

Frequency CR2016 CR2025 CR2032

20 Hz 63.5 92.6 9.1 100 Hz 58.0 82.6 7.9 1 KHz 47.0 48.0 7.1 10 KHz 18.9 33.0 4.9 100 KHz 4.8 29.2 3.2 1 MHz 2.6 27.4 2.6

The measurement was done with 10 mV across the cell, and the impedances are given in ohms.

I would guess that a new CR2025 might lie between the CR2016 and the CR2032.

The data sheet doesn't provide that specific detail but it does suggest that further info can be requested.

Nice testing there. What instrument(s) did you use?

Panasonic used to have data. Check:

I've drawn 180+ mA out of a CR2032 and ended up with a reasonable lifespan. Application was a little demo card with a bunch of LED's controlled with a AVR uC . The capacity specs are actually pretty accurate, even for really low draws. I have a machine that used a big AA sized lithium cell, and I didn't have replacement, so I soldered the wires to a new Panasonic CR3032 (we had a ton in stock). About a year and a half later, the battery died - surprised at the short life I measured the current draw - it worked out that the battery was to be dead right around that time!

Wayne-Kerr 6440B. See the images on ABSE.

>

"The Phantom" "Oppie"

** What a " wank err " !!!! ( pun intended )

I found impedance figures near identical to those given for the CR2032 ( using a new example of same ) with just my bench sine wave generator, a scope and a few low value resistors.

....... Phil