Lol that's exactly what I was planning on using it with. I just hate taking out the little screw on the backyuprules 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.
Amazon.ca
CR2032 3v Lithium Batteries - 20count- 25cents each $5.05 no tax
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- timbit01
- Member
- Jun 12, 2013
- 291 posts
- 320 upvotes
- Edmonton
- mikka2017
- Deal Expert
- Jan 12, 2017
- 23019 posts
- 6892 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 >>
- methyl
- Sr. Member
- Oct 16, 2002
- 834 posts
- 674 upvotes
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?
- Klikerko
- Member
- Jul 28, 2011
- 256 posts
- 187 upvotes
- Toronto
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.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?
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.
- webeye
- Sr. Member
- Apr 15, 2018
- 596 posts
- 884 upvotes
- dospat
- Jr. Member
- Nov 23, 2014
- 126 posts
- 233 upvotes
- Toronto, ON
I’ve always purchased Energizers from Amazon.
www.amazon.ca/dp/B0002RID4G/ref=dp_iou_ ... psc=1&th=1
I’d be curious to see what last longer Energizers or the Duracells from Costco.
www.amazon.ca/dp/B0002RID4G/ref=dp_iou_ ... psc=1&th=1
I’d be curious to see what last longer Energizers or the Duracells from Costco.
- peteryorkuca
- Deal Fanatic
- Jul 26, 2007
- 7579 posts
- 5272 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.
- Alexandero2
- Deal Addict
- Mar 26, 2011
- 2088 posts
- 1511 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.
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.
- GSD
- Deal Addict
- Jul 5, 2005
- 4081 posts
- 1967 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.
- biggaroupa
- Sr. Member
- Aug 15, 2007
- 614 posts
- 265 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
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
- webeye
- Sr. Member
- Apr 15, 2018
- 596 posts
- 884 upvotes
- max011
- Deal Fanatic
- Nov 25, 2003
- 5581 posts
- 7780 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...
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He who gives up a little freedom to gain a little security, deserves neither and will lose both. (Benjamin Franklin)
He who gives up a little freedom to gain a little security, deserves neither and will lose both. (Benjamin Franklin)
- ipassgas [OP]
- Sr. Member
- Apr 8, 2007
- 872 posts
- 337 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!
- fmf132
- Member
- Dec 9, 2008
- 360 posts
- 180 upvotes
- Ottawa
Another option for consideration...AmazonBasics CR2032, 10 count for $7.25...
https://www.amazon.ca/dp/B07RXJ4S7Z/ref ... UTF8&psc=1
https://www.amazon.ca/dp/B07RXJ4S7Z/ref ... UTF8&psc=1
- stovetop
- Deal Addict
- Dec 3, 2006
- 4593 posts
- 19427 upvotes
- Vancouver, BC
Think of the environment!!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!
- yuprules
- Deal Guru
- Mar 4, 2004
- 10229 posts
- 3143 upvotes
- Montreal
@Klikerko time for a new chart with the AmazonBasics onesfmf132 wrote: ↑ Another option for consideration...AmazonBasics CR2032, 10 count for $7.25...
https://www.amazon.ca/dp/B07RXJ4S7Z/ref ... UTF8&psc=1
- dilligafeh
- Deal Guru
- Aug 15, 2015
- 10494 posts
- 7628 upvotes
- ON
It shows OP next to your username in all your posts in the threads you start, you don't need to say it.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!
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.