Which type of battery has lowest internal losses
I have a small battery-operated calculator that I rarely use, but when
I do need it, I want to be sure the battery hasn't run down. The button cell can be a LR54, LR1130, D189, RW89, 389, SR54, or one of several other codes, Either silver or alkaline. Does anyone know which type of battery has the lowest internal self-discharge? |
Which type of battery has lowest internal losses
On Mar 4, 3:42*pm, "hr(bob) "
wrote: I have a small battery-operated calculator that I rarely use, but when I do need it, I want to be sure the battery hasn't run down. *The button cell can be a LR54, LR1130, D189, RW89, 389, SR54, or one of several other codes, *Either silver or alkaline. *Does anyone know which type of battery has the lowest internal self-discharge? Keep in mind, that a lot of battery chemistries have the following quirk: shelf life years!, unless... measure the battery's voltage under load [in other words, use it once] and a process starts that runs the battery down very quickly with shelf life into even the 3 month range. [which means it's not good to test the batteries in those emergency kits] Anyone have numbers for this effect? |
Which type of battery has lowest internal losses
On 3/4/2010 4:01 PM Robert Macy spake thus:
On Mar 4, 3:42 pm, "hr(bob) " wrote: I have a small battery-operated calculator that I rarely use, but when I do need it, I want to be sure the battery hasn't run down. The button cell can be a LR54, LR1130, D189, RW89, 389, SR54, or one of several other codes, Either silver or alkaline. Does anyone know which type of battery has the lowest internal self-discharge? Keep in mind, that a lot of battery chemistries have the following quirk: shelf life years!, unless... measure the battery's voltage under load [in other words, use it once] and a process starts that runs the battery down very quickly with shelf life into even the 3 month range. [which means it's not good to test the batteries in those emergency kits] Anyone have numbers for this effect? The Heisenberg uncertainty principle? Schrödinger's cat? -- You were wrong, and I'm man enough to admit it. - a Usenet "apology" |
Which type of battery has lowest internal losses
I don't "know", but I suspect the silver cells have a longer shelf life.
They also have a higher energy density. |
Which type of battery has lowest internal losses
On Mar 4, 7:29*pm, "William Sommerwerck"
wrote: I don't "know", but I suspect the silver cells have a longer shelf life. They also have a higher energy density. That's also what I found in going to Wikipedia, so I'll look for the silver cells at my local Menards Hardware store. It's enuf closer to where I live than HD or Lowes to make it my store of choice, as long as I get a name brand. For unnamed stuff, I am dubious about the quality Menards sells ever since I bought some unnamed boxed finishing nails and found them to be about as durable as uncooked spaghetti. |
Which type of battery has lowest internal losses
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Which type of battery has lowest internal losses
On Mar 6, 1:35*pm, mm wrote:
On Thu, 4 Mar 2010 15:42:28 -0800 (PST), "hr(bob) " wrote: I have a small battery-operated calculator that I rarely use, but when I do need it, I want to be sure the battery hasn't run down. *The button cell can be a LR54, LR1130, D189, RW89, 389, SR54, or one of several other codes, *Either silver or alkaline. *Does anyone know which type of battery has the lowest internal self-discharge? I often sort of hate it when people undermine an OP by suggesting something entirely different from what he wants, so please forgive me for doing just that. How about a solar-powered calculator? *I have a cheap one that does so many functions I'll never use a bunch of them that runs off the ceiling light, or the desk lamp. * It may have been 20 dollars, years ago, when there was a sale at Radio Shack. *But no batteries. *Here it is, Radio Shack 10-digit Scientific Calculator EC-4032. It has logs and trig and exponenets and I got it because it has hex, bin, and oct arithmetic which I once in a while used as a programmer. * *Probably something similar with a different model number now. Thanx, it turns out that the ribbon connector from the calculator PWB to the LCD display also came off when I opened it to take the batteries out, and I ended up throwing eerything into the trash, I probably don't need anything more than sine, cosine and tanget and exponents so another calculator I have can handle those. |
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