Re: OT: Battery Tester for nonrechargeable Lithium AA Batteries.
Nearly full voltage, but not quite. If you have an accurate voltmeter you can cross reference the voltage (and temperature) and look up the state of charge assuming you have the relevant data tables. Once upon a time I had these for lead/acid batteries but presumably thay can be obtained for other types as well. Rob. - Original Message - From: <[EMAIL PROTECTED]> I would guess even an almost depleted battery will show nearly full voltage with no load. The problem is that testing is a catch 22. If you provide adequate load to really test the batteries, you'll drain them. -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.362 / Virus Database: 267.12.8/161 - Release Date: 03/11/2005
Re: OT: Battery Tester for nonrechargeable Lithium AA Batteries.
Understand. Your approach makes sense for you requirement. In my case, the cells are in reserve/backup circuit. Load is applied randomly for varying period. There is no meaningful indication over a given period how much capacity has been used, etc. etc. Otis Wright Godfrey DiGiorgi wrote: Perhaps I don't understand the circumstances of your need adequately. It's certainly too much trouble for my uses to test and measure battery status. Whenever I buy batteries, particularly Li disposables, I put a date on them and put them into my battery box. I know Li disposables have a 6-7 year shelf life ... after a year, they will rarely have lost more than 5% total capacity. I rarely do this, but if I have been using a particular set and taken it out of the camera, I mark it with a red dot to say "partially used". The reason I rarely do this is that it's generally speaking not common to just swap batteries in and out with Li disposables. Most of the time you just keep them in the camera until they are exhausted and replace them. When putting together equipment for a trip or field session and counting on Li disposables, I just make sure I have an appropriate number of unused new batteries as backup. I've never been caught out. Godfrey On Nov 3, 2005, at 9:19 AM, Otis C. Wright, Jr. wrote: Nothing, if you understand what you get when you read open circuit voltage and these results are acceptable for your application. Depends on the accuracy you want. My experience has been that testing batteries under load gives more accurate indication of status.I could, but am not interested in doing so, assemble a load/meter combo using the manufacturers data. Assembly is relatively easy. Calibration/test and packaging for field use takes time I'd rather spend doing something else. I was looking for a prepackaged reasonable quality unit for field use in assessing cells used randomly in a standby/backup application. Otis Wright Godfrey DiGiorgi wrote: What's wrong with a simple voltmeter? Godfrey On Nov 3, 2005, at 8:23 AM, Otis C. Wright, Jr. wrote: Anyone have experience with a good tester for nonrechargeable Lithium AA batteries? Thanks in advance. Otis Wright
Re: OT: Battery Tester for nonrechargeable Lithium AA Batteries.
Perhaps I don't understand the circumstances of your need adequately. It's certainly too much trouble for my uses to test and measure battery status. Whenever I buy batteries, particularly Li disposables, I put a date on them and put them into my battery box. I know Li disposables have a 6-7 year shelf life ... after a year, they will rarely have lost more than 5% total capacity. I rarely do this, but if I have been using a particular set and taken it out of the camera, I mark it with a red dot to say "partially used". The reason I rarely do this is that it's generally speaking not common to just swap batteries in and out with Li disposables. Most of the time you just keep them in the camera until they are exhausted and replace them. When putting together equipment for a trip or field session and counting on Li disposables, I just make sure I have an appropriate number of unused new batteries as backup. I've never been caught out. Godfrey On Nov 3, 2005, at 9:19 AM, Otis C. Wright, Jr. wrote: Nothing, if you understand what you get when you read open circuit voltage and these results are acceptable for your application. Depends on the accuracy you want. My experience has been that testing batteries under load gives more accurate indication of status.I could, but am not interested in doing so, assemble a load/meter combo using the manufacturers data. Assembly is relatively easy. Calibration/test and packaging for field use takes time I'd rather spend doing something else. I was looking for a prepackaged reasonable quality unit for field use in assessing cells used randomly in a standby/backup application. Otis Wright Godfrey DiGiorgi wrote: What's wrong with a simple voltmeter? Godfrey On Nov 3, 2005, at 8:23 AM, Otis C. Wright, Jr. wrote: Anyone have experience with a good tester for nonrechargeable Lithium AA batteries? Thanks in advance. Otis Wright
Re: OT: Battery Tester for nonrechargeable Lithium AA Batteries.
Nothing, if you understand what you get when you read open circuit voltage and these results are acceptable for your application. Depends on the accuracy you want. My experience has been that testing batteries under load gives more accurate indication of status.I could, but am not interested in doing so, assemble a load/meter combo using the manufacturers data. Assembly is relatively easy. Calibration/test and packaging for field use takes time I'd rather spend doing something else. I was looking for a prepackaged reasonable quality unit for field use in assessing cells used randomly in a standby/backup application. Otis Wright Godfrey DiGiorgi wrote: What's wrong with a simple voltmeter? Godfrey On Nov 3, 2005, at 8:23 AM, Otis C. Wright, Jr. wrote: Anyone have experience with a good tester for nonrechargeable Lithium AA batteries? Thanks in advance. Otis Wright
Re: OT: Battery Tester for nonrechargeable Lithium AA Batteries.
I would guess even an almost depleted battery will show nearly full voltage with no load. The problem is that testing is a catch 22. If you provide adequate load to really test the batteries, you'll drain them. Paul > That's what I'd use. OTOH maybe he wants to test them under load. > > Godfrey DiGiorgi wrote: > > > What's wrong with a simple voltmeter? > > > > Godfrey > > > > On Nov 3, 2005, at 8:23 AM, Otis C. Wright, Jr. wrote: > > > >> Anyone have experience with a good tester for nonrechargeable > >> Lithium AA batteries? > >> > >> Thanks in advance. > >> > >> Otis Wright > >> > > > > > > > -- > When you're worried or in doubt, > Run in circles, (scream and shout). >
Re: OT: Battery Tester for nonrechargeable Lithium AA Batteries.
That's what I'd use. OTOH maybe he wants to test them under load. Godfrey DiGiorgi wrote: What's wrong with a simple voltmeter? Godfrey On Nov 3, 2005, at 8:23 AM, Otis C. Wright, Jr. wrote: Anyone have experience with a good tester for nonrechargeable Lithium AA batteries? Thanks in advance. Otis Wright -- When you're worried or in doubt, Run in circles, (scream and shout).
Re: OT: Battery Tester for nonrechargeable Lithium AA Batteries.
What's wrong with a simple voltmeter? Godfrey On Nov 3, 2005, at 8:23 AM, Otis C. Wright, Jr. wrote: Anyone have experience with a good tester for nonrechargeable Lithium AA batteries? Thanks in advance. Otis Wright
OT: Battery Tester for nonrechargeable Lithium AA Batteries.
Anyone have experience with a good tester for nonrechargeable Lithium AA batteries? Thanks in advance. Otis Wright
