Does anybody have a weblink for the temperature coefficient
of voltage for commercial (Energizer) size 357 silver oxide-zinc
button cells? Nominal is 1.55 volts, but knowing the temp effect
is (maybe) important if I'm stacking up nine or ten of them.
I'd like to check a trio of inexpensive Radio Shack DVMs for use
in charging relatively-expensive lithium iron phosphate batteries.
On the same battery the three meters report 14.41, 14.51 and 14.58
volts, so they certainly disgree among themselves. I suspect but
can't yet prove that the middle one is about 2% higher than actual.
Yes, I probably should buy a good DVM, but the Radio Shack units
are on-hand and except for charging batteries absolute accuracy
isn't usually of much importance.
Ten millivolts is plenty good for present purposes. If there's a >better/cheaper improvised reference in this range please post!
CR2032 cells are readily available, but voltage details are scarce.
Thanks for reading,
bob prohaska
Does anybody have a weblink for the temperature coefficient
of voltage for commercial (Energizer) size 357 silver oxide-zinc
button cells? Nominal is 1.55 volts, but knowing the temp effect
is (maybe) important if I'm stacking up nine or ten of them.
I'd like to check a trio of inexpensive Radio Shack DVMs for use
in charging relatively-expensive lithium iron phosphate batteries.
On the same battery the three meters report 14.41, 14.51 and 14.58
volts, so they certainly disgree among themselves. I suspect but
can't yet prove that the middle one is about 2% higher than actual.
Yes, I probably should buy a good DVM, but the Radio Shack units
are on-hand and except for charging batteries absolute accuracy
isn't usually of much importance.
Ten millivolts is plenty good for present purposes. If there's a better/cheaper improvised reference in this range please post!
CR2032 cells are readily available, but voltage details are scarce.
Thanks for reading,
bob prohaska
Does anybody have a weblink for the temperature coefficient
of voltage for commercial (Energizer) size 357 silver oxide-zinc
button cells? Nominal is 1.55 volts, but knowing the temp effect
is (maybe) important if I'm stacking up nine or ten of them.
I'd like to check a trio of inexpensive Radio Shack DVMs for use
in charging relatively-expensive lithium iron phosphate batteries.
On the same battery the three meters report 14.41, 14.51 and 14.58
volts, so they certainly disgree among themselves. I suspect but
can't yet prove that the middle one is about 2% higher than actual.
Yes, I probably should buy a good DVM, but the Radio Shack units
are on-hand and except for charging batteries absolute accuracy
isn't usually of much importance.
Ten millivolts is plenty good for present purposes. If there's a better/cheaper improvised reference in this range please post!
CR2032 cells are readily available, but voltage details are scarce.
Thanks for reading,
bob prohaska
https://tinyurl.com/2ajs395b
https://www.google.com/search?q=5+volt+reference&client=firefox-b-1-d&sxsrf=ALiCzsa702yEJPZb4SzokD4GXJ1Jimyrjw:1661422961250&source=lnms&tbm=shop&sa=X&ved=2ahUKEwiA7rTr4uH5AhXOoWoFHb3PDVkQ_AUoAXoECAEQAw&biw=1472&bih=657&dpr=1.3
If a silver oxide battery goes below 30% charge, there will
be about a 100mv step increase in terminal voltage: ><http://members.iinet.net.au/~fotoplot/accbatcc.htm> ><http://members.iinet.net.au/~fotoplot/dis.jpg>
Does anybody have a weblink for the temperature coefficient
of voltage for commercial (Energizer) size 357 silver oxide-zinc
button cells? Nominal is 1.55 volts, but knowing the temp effect
is (maybe) important if I'm stacking up nine or ten of them.
Ten millivolts is plenty good for present purposes. If there's a >better/cheaper improvised reference in this range please post!
CR2032 cells are readily available, but voltage details are scarce.
Sysop: | Keyop |
---|---|
Location: | Huddersfield, West Yorkshire, UK |
Users: | 292 |
Nodes: | 16 (2 / 14) |
Uptime: | 179:42:56 |
Calls: | 6,616 |
Calls today: | 3 |
Files: | 12,165 |
Messages: | 5,314,109 |