There are many different battery brands on the market.
Alas, most of them leave significant space for quality improvement. This is particularly important if you power your device with one cell only.
Assume you have got a set of CR2032 cells and a simple multimeter. Does this suffice for assessing cell quality? Maybe by comparison? Or what more do you need?
(I did search the fora but to no avail.)
How to assess coin cell quality?
How to assess coin cell quality?
WP43 SN00000, 34S, and 31S for obvious reasons; HP-35, 45, ..., 35S, 15CE, DM16L S/N# 00093, DM42β SN:00041
Re: How to assess coin cell quality?
I use to test coin batteries with an old 10000 Ohm/volt analog multimeter. Modern digital multimeters (DMM) have such a great input impedance (~10 MegaOhm) that won't load the batteries at all. For instance, you can read 3V with a DMM for a lithium battery (big coin) and it may be pretty flat, specially if it is one of those big-name fakes that you can get for peanuts on ebay, etc. On the other hand, a 2.8V DMM reading can lead to a battery with enough juice to run most appliances if there's enough current in it, i.e.: a legit good battery brand.
Old analog multimeters with such a crappy input impedance (for today's standards) put some load in the battery and thus the resulting reading is more accurate.
[edit = typo]
Old analog multimeters with such a crappy input impedance (for today's standards) put some load in the battery and thus the resulting reading is more accurate.
[edit = typo]
Last edited by Calambres on Wed Sep 21, 2022 6:20 am, edited 1 time in total.
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Re: How to assess coin cell quality?
I use one of these resistance substitution boxes for testing coin cells:
https://www.amazon.com/Elenco-Resistor- ... B00R6SOXLG
Clip it to both leads of your multimeter to create a load on the battery, and see how the voltage fares in the 220-1000 Ohm range (3-14 mA current).
https://www.amazon.com/Elenco-Resistor- ... B00R6SOXLG
Clip it to both leads of your multimeter to create a load on the battery, and see how the voltage fares in the 220-1000 Ohm range (3-14 mA current).
Re: How to assess coin cell quality?
Just a frustrated comment here.... anytime anyone places an Amazon link to any product, and/or any product on any forum, that that Amazon product is "Currently Unavailable"????Dave Britten wrote: ↑Tue Sep 20, 2022 5:58 pmI use one of these resistance substitution boxes for testing coin cells:
https://www.amazon.com/Elenco-Resistor- ... B00R6SOXLG
Clip it to both leads of your multimeter to create a load on the battery, and see how the voltage fares in the 220-1000 Ohm range (3-14 mA current).
https://uk.farnell.com/elenco/k-37/subs ... dp/2819438
Re: How to assess coin cell quality?
I just clicked the link and it's available for me (in USA) for $22.97 w/free delivery. Just FYIPanchdara wrote: ↑Tue Sep 20, 2022 9:54 pmJust a frustrated comment here.... anytime anyone places an Amazon link to any product, and/or any product on any forum, that that Amazon product is "Currently Unavailable"????
https://uk.farnell.com/elenco/k-37/subs ... dp/2819438
--bob p
DM42: β00071 & 00282, DM41X: β00071 & 00656, DM10L: 071/100
DM42: β00071 & 00282, DM41X: β00071 & 00656, DM10L: 071/100
Re: How to assess coin cell quality?
Looks like a common supply chain problem: it's not available in Germany either. But luckily Amazon is not a monopolist yet ...
WP43 SN00000, 34S, and 31S for obvious reasons; HP-35, 45, ..., 35S, 15CE, DM16L S/N# 00093, DM42β SN:00041
Re: How to assess coin cell quality?
Thank you! You saved my 196x Kosmos Ultron from the bin.
WP43 SN00000, 34S, and 31S for obvious reasons; HP-35, 45, ..., 35S, 15CE, DM16L S/N# 00093, DM42β SN:00041
Re: How to assess coin cell quality?
Most of what is available on Amazon now is coming from China unfortunately At least for hardware. I'm avoiding this reseller as much as possible except for "local" products when there is no viable alternative.
Re: How to assess coin cell quality?
Well, I did find one at Farnell. Yeah, I don't know why I seem to be the only one with this dilema. But no worries - I can buy alot, alot of 2032 batteries for £28.
(Perhaps it's my ip address???? But I do stand by my "frustration" of items being unavailable. A cat's got a lotta skins )
Battening down the hatches as I await hurricane Fiona ...
Best
(Perhaps it's my ip address???? But I do stand by my "frustration" of items being unavailable. A cat's got a lotta skins )
Battening down the hatches as I await hurricane Fiona ...
Best