Assault on Batteries #1 | Rechargeable Lithium-Ion AA
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- čas přidán 1. 04. 2024
- Independent lab tests reveal why rechargeable lithium-ion AA batteries can’t replace disposable alkaline cells in some applications. A web site is introduced with a cell capacity scoreboard and technical details not available from manufacturers:
- discharge curves
- source resistances
- electromagnetic interference (EMI)
aob.spukhafte.net/
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Tested Cells
* AmpTORRENT AT3000
* EBL 3000mWh
* Jugee RO5BP410S35-3000
* Kentli PH5
* Kentli PM5
* Hixon J818 AA
* Maxlithium HY15
* Maxwel 2600mWh
* Palo 2800
* Pownergy Li6M
* Smartoools 2600mWh
* Tenavolts AA 2775mWh
To see inside an actual cell, follow the link in the description for one of Big Clive’s entertaining teardowns of a Jugee cell.
Big Clive’s Full Teardown
• JUGEE battery teardown...
Rip It Apart
ripitapart.com/category/batte...
This video features materials protected by the Fair Use guidelines of Section 107 of the Copyright Act. All rights reserved to the copyright owners.
00:00 Beginning
00:35 Batteries
00:47 Architecture
01:59 Discharge Setup
02:48 Scoreboard
03:19 Exhaustion
04:18 EMI Setup
05:10 EMI
06:56 Conclusion
07:32 Outro - Věda a technologie
When you put "cells interlinked" I was expecting a Blade Runner reference, and you did not disappoint. Thanks for the chuckles and a very informative video nonetheless :)
I'm so glad you got it. I was beginning to think it too arcane.
@@on-the-fritz what matters is you do you!
This was very well done. Not long, and quite to the point, in terms of explaining why various applications suit these batteries, and others don't.
Thanks!
Oh my Lord I had absolutely no idea there were USB rechargeable AA batteries! I've never purchased something so quickly my life I'm truly shocked that somehow I've never seen or heard about anything like that. Thank you so much!
Glad to have helped!
Amazing testing!!!
Thanks!
Very interesting test, thanks.
Glad you liked it!
Hi! thank you for this video, I appreciate the very high quality and effort you put into this content, nowadays it is really rare to find this kind of well documented videos, liked and subscribed
Much appreciated!
Luckily most things that I have come across that utilize AA or AAA batteries are disappearing. Nowadays I only see them in remote controls, wireless keyboards and mice. I use disposable batteries in those since they tend to last multiple years and I don't believe the environmental impact is significantly less when I use rechargables. Of course I properly dispose of them and not put them in the trash.
On a recent trip, it occurred to me removable lithium-ion batteries and cells have an advantage when flying: you can check-in the device they power and carry the batteries in your carry-on, per TSA rules. Devices that take standard AA or AAA tend to be inexpensive enough to risk checking in.
Wow. Nice test. I wish I could buy these brands but these are not available in Europe.
Btw, this is the first comment of the first video, yay!
Yes, you're the first of the first.
You should be able to get lithium-ion AA cells in Europe. I'm sure Aliexpress would ship to the EU and I know the Hixon cells are available on Amazon.de.
Thanks for watching!
Learned something new! Didn't know about buck convertor inside these cells (makes sense now that i think of it).
Would it be difficult to modify a tool to accept batteries like this? Could be an interesting video 😊 .
I assume a small in series impedance would do the trick for the switching frequencies in the mhz range?
Something like a ferrite would help, but it would have to be effective at the fundamental and harmonics of the switching frequency (harmonics probably extend far above the upper limit of the CISPR 22 test), while conducting a heavy (relative to the RF noise) DC current. Whatever Apple did in the A1385 works well. Maybe a designer of switching supplies will weigh in?
I find it kind of odd that the roughly 3Wh in the best Li-Ion AA cells is basically the same as what you get from a decent NiMH AA cell. I suppose the sligntly lower voltage of NiMH chemistry could be a factor, but I've yet to find anything that won't run on NiMH cells as they have a slightly higher voltage than the older NiCd chemistry cells.
And NiMH has a low internal resistance-great for photo flashes.
@@on-the-fritz I noticed that with my power-hungry Kodak digital camera back in 2000. A set of 4 alkaline AAs would get chewed up pretty quick (could be used in less intense stuff after), but a set of NiMH cells would last at least three times as long. And the ones I had at the time were only 1300mAh.
Modern alkalines are about half the 1300mAh claimed by your NiMH cells. Have a look: aob.spukhafte.net/?chem=ZnMnO2&form=AA&load=1.0&rank=t&num=5
@@on-the-fritz At a 1A drain, that doesn't surprise me at all. I recall the Alkaline AAs in my camera getting warm. Not quite as warm as my old Tyco Turbo Hopper (the 8AA version before the 9.6V battery pack was a thing), but still warm. I wish I had tried NiMH cells in my Game Boy. It was low drain, but even my 600mAh NiCd AAs lasted all day and then some on a charge.
What do these give as an advantage to regular NiMH? I've got a bunch from ikea, 2200mAh, no switching shenanigans. Am I missing the point here?
NiMH batteries output 1.2V, whereas these Lithium ion ones output 1.5V, same as Alkaline batteries.
Also a NiMH cell reduces its voltage as it discharges, whereas the bucked lithium-ion cells hold a constant 1.5V (and constant power) over their entire discharge.
The whole idea to make lithium-ion 3.7V/Cell compatible with the typical 1.5V/Cell is stupid. The only way to make this problem go away is to introduce new standard sizes/shapes for lithium-ion cells that are just replaceable without the need for buck converters. The problem is that no hard case universal models that are vendor independent standardized exist. If something like that exists, slowly but surely more vendors would make new appliances with this new standard and the old one would fade over time. Yes that will take many years, but lithium-ion already exists long enough. If they would have done this from the start it would not been a problem today. It's just companies trying to keep market with propriety designs and being against standards if they can prevent standards to make more money they will. Remember that Sony was one of the first making and selling lithium ion batteries to the general public since 1991. How many devices would have existed today if they had done it right from the start? How many battery driven devices do you still own that are from before 1991?
Agreed, the buck converter, if needed, should be in the device, where it can be properly filtered.
You can get lithium-ion in 14500 form, which is close to AA. Some even with a button top. Some even with LiFePO4 chemistry. You can replace two 1.5V AAs with one 14500 and a dummy cell, but you have to manually monitor discharge or you'll damage the cell with deep discharge. So "don't try this at home".
I definitely won't be buying any of these to put in a wireless game controller, then.
Correct-unless the manufacturer of the controller specifies their product works with buck-regulated cells.
Why on Earth would anyone buy batteries with USB sockets.
Oh I'm sorry, cells.
That was my reaction too. I just wanted the most capacity or energy per cell. I've noticed since though, it's convenient in some situations, like travelling, to not need a proprietary charger, especially if your battery-powered device only needs one cell.
Sorry, I mean a cell-powered device. :)