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[Amazon.ca] CR2032 3v Lithium Batteries - 20count- 25cents each $5.05 no tax

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  • Nov 2nd, 2020 5:26 pm
Deal Addict
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Dec 9, 2005
3541 posts
1655 upvotes
Ontario
I've always found that where button batteries are concerned, the name brand is worth the extra price.

For how much longer they last, the aggregation of having it dying and replacing them is oft a pain in the ass. Unless you're using a lot of them, the extra few dollars is just worth it.
Kaboom! Kaboom! KABOOM!
Member
Jun 12, 2013
241 posts
246 upvotes
Edmonton
yuprules wrote: I have no name rechargeable CR2032 ones from Aliexpress that I got with the charger. They last as long as the Dollarama ones in my Pokémon Go Plus ( a bluetooth device to play Pokémon Go, very high/heavy usage, 2-3 months in this device, again HEAVY drain hence the short life). The black charger has two slots and two UK Prongs, looks like it's going to catch fire at any moment. I suggest the more expensive looking one LOL.
Lol that's exactly what I was planning on using it with. I just hate taking out the little screw on the back
Deal Guru
Jan 12, 2017
13241 posts
3624 upvotes
Scarberia
are these the ones used in apple 4k remotes or the 2017 nvidia shield? tia
*SIG: Ryzen R5 2600 cpu w/ ASrock B450M OCd to 4.0ghz@1.265v stock cooler 16gb ram win10 pro w/radeon rx460 rogers Gigabit<< xb1 gamertag: mikka2017 >>
Sr. Member
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Oct 16, 2002
772 posts
583 upvotes
Klikerko wrote:


Conclusion
The Duracell battery reached 2V after 26 hours, while the LiCB battery lasted only 12 hours. In this scenario, Duracell easily outlasted LiCB but I would still go for LiCB battery for non-essential devices.
This could be a result of slightly different chemistry. Depending on the chemistry the nominal voltage can be slightly different, but both batteries may nevertheless have a similar capacity. Have you tried to calculate the total capacity, ie until the point the voltage starts to drop sharply down? Many devices may not have a 2v cutoff, but instead start to draw higher current, until the end. Can you program the arduino to draw constant power rather than using constant current?
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Jul 28, 2011
244 posts
161 upvotes
Toronto
methyl wrote: This could be a result of slightly different chemistry. Depending on the chemistry the nominal voltage can be slightly different, but both batteries may nevertheless have a similar capacity. Have you tried to calculate the total capacity, ie until the point the voltage starts to drop sharply down? Many devices may not have a 2v cutoff, but instead start to draw higher current, until the end. Can you program the arduino to draw constant power rather than using constant current?
I'm not aware of the way to have Arduino draw constant power. Regardless, I would prefer an external device to do that and let Arduino do only logic. I got interested in this project as I'm learning a lot so I'm working on a few improvements.
1) Ability to measure draw
2) Better (more accurate) external device with variable load (LEDs were OK for a proof of concept)
3) Ability to measure up to 12V (Current limit is 5V)

I might redoo the test once I have everything in place.
Deal Fanatic
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Jul 26, 2007
5222 posts
2802 upvotes
Toronto
If you enjoy replacing these coin battery every other months like I do on your key fob, buy these brand. Atleast you will be proficient at taking the fob apart.
Deal Addict
Mar 26, 2011
1658 posts
1020 upvotes
Toronto
I'm sometimes surprised by how passionate people get about the most mundane things.

I've bought my CR2032 and other button batteries from eBay (no name brands) and haven't had any issues. I haven't notice them die all that much faster compared to the Energizer's I used to buy. I think once in a while I'll notice the odd one die out faster but by and large they last about as long (but I'm not there with a stop watch).

Anywho, FWIW. I don't want to fight about it.

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Jul 5, 2005
3148 posts
1067 upvotes
Toronto
Its the mah = amp hours that make a big difference in these batteries. My keyfob for my MB doesn't last long with the cheapo batteries.
Sr. Member
Aug 15, 2007
565 posts
232 upvotes
Richmond Hill
I do not recommend buying small brands for these batteries, or else you'll be replacing them after a few weeks/months, I made this mistake trying to save a few dollars.

The Sony ones from this seller have been working great, at $11/20pcs it's a super great price!

https://www.amazon.ca/gp/product/B00WXE ... UTF8&psc=1
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Nov 25, 2003
4682 posts
6642 upvotes
Vancouver
Interestingly no one mentioned (or I missed it) LIVINGbasics CR2032 3V Lithium Coin Cell Battery 4/Pack that's very often $.99 @ Prime Cables. Very popular when there is a free shipping event. I had decent results with these, however I have a very limited use for them. So at the same note I don't need a lot of them at once. Generally, reviews are OK...
"A fool and his money are soon parted" Thomas Tusser (1524-1580)
[OP]
Sr. Member
Apr 8, 2007
743 posts
258 upvotes
I'm the OP. I've used 5 of the 20 so far. Despite all the analysis and all the theorizing, the five I've used so far seem fine. 2 key fobs, 1 garage door remote, and 2 in my bathroom scale. (unfortunately, I was hoping they wouldn't be strong enough and would underestimate my weight -- that didn't happen). For 25 cents each, so far so good. My humble opinion -- you guys are spending too much time analyzing this. Good deal on cheap batteries.... and if they don't last quite as long as whatever name brand, I have 15 more in the box ready to go!
Deal Addict
Dec 3, 2006
2569 posts
3505 upvotes
Vancouver, BC
ipassgas wrote: I'm the OP. I've used 5 of the 20 so far. Despite all the analysis and all the theorizing, the five I've used so far seem fine. 2 key fobs, 1 garage door remote, and 2 in my bathroom scale. (unfortunately, I was hoping they wouldn't be strong enough and would underestimate my weight -- that didn't happen). For 25 cents each, so far so good. My humble opinion -- you guys are spending too much time analyzing this. Good deal on cheap batteries.... and if they don't last quite as long as whatever name brand, I have 15 more in the box ready to go!
Think of the environment!!
Deal Fanatic
Aug 15, 2015
8700 posts
5073 upvotes
ON
ipassgas wrote: I'm the OP. I've used 5 of the 20 so far. Despite all the analysis and all the theorizing, the five I've used so far seem fine. 2 key fobs, 1 garage door remote, and 2 in my bathroom scale. (unfortunately, I was hoping they wouldn't be strong enough and would underestimate my weight -- that didn't happen). For 25 cents each, so far so good. My humble opinion -- you guys are spending too much time analyzing this. Good deal on cheap batteries.... and if they don't last quite as long as whatever name brand, I have 15 more in the box ready to go!
It shows OP next to your username in all your posts in the threads you start, you don't need to say it.
There's no theorizing, folks are talking about their experiences with such products, as your personal experience only might not represent the real performance. Don't take it personally, especially when you post deals about no name products from companies that don't have a significant presence in the market.

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