How do they make 1.5V Li-ion AA Batteries? [XTAR]
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- Опубліковано 16 жов 2024
- Get the XTAR Li/NiMH AA/AAA Battery Charger here: amzn.to/3rCnDpc
And XTAR 1.5V AA Batteries: amzn.to/46eCsgP
Li-ion batteries are nominally 3.7V or so. So they have to do a bit of conversion and Alkaline cell mimicking in order to turn it into a 1.5V cell. The way this is done is a converter inside but they also added a 5V charging system so that it can be recharged quickly. Internally, it even has a green led that blinks a few times when the battery is low. The output voltage is lowered when it is less than 20% as well. The advantage of these Li-ion cells over NiMH is that they have slightly higher capacity and no memory effect. You do need a specialized charger specifically for li-ion 1.5V cells.
#xtarbatteries #lithiumbatttery #AAbattery
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I love that they just shut down when they are done. I hate the slow dimming of the old batteries.
I bought these too. Every time I checked them they were at 1.5V, so it's good that you explained this.
I was looking for information about single use lithium AA cells (such as those made by Energizer), which also output 1.5 volts, but it was interesting to see this type of rechargeable cell with built in buck converter. I've seen other brands that come with a micro USB charging socket on the side of the package.
Great Vid! I was wondering how they got 4V Li-Ion down to 1.5V. Thanks for solving the puzzle for me.
so much good info and work put in
Glad it was helpful!
I got a set of these batteries and been using it with ISDT A8 Air charger, they work amazing!
Oh wow... I didn't know such things exists! I'm a sucker for this excessive info stuff with the wireless charging monitor on individual batteries! Looks great!
I’m glad I found this video I was looking at 1.5 rechargeable batteries for my quest controllers, and most of the 1.5 rechargeable batteries just go from 100% to 0% so the VR headset battery indicator for your controllers will read 100% and then it just will drop to zero and die, with these the headset should tell you when they’re low instead of just dying all of a sudden theoretically.
New subscriber here. Thanks for the video. I have some XTAR chargers for the 18650 cells and they work well. I assume this charger works with single cells (not in pairs). Also is there a XTAR AAA battery also? Thanks and all the best from north Texas.
One important info you didn't mention is the self discharge rate when on the shelf. I have seen quite a few of these over the years where the circuit will discharge the cell inside to zero killing it.
My guess is that the battery has a built in protection circuit. The drop to 1.2v is there to tell you the battery is running out and my guess is that the battery never actually completely runs out, and that it just shuts down when the voltage drops to the point where they want to stop it from being discharged. This is the way to do it. Many 21700 and 13650 batteries are "protected" and the circuitry in them does the same thing. The battery won't let you discharge it to the point where it is damaged. That is my theory, the 1.2 step is your warning that the over-discharge protection is getting ready to kick in.
Very informative! Thank you.
I would be interested in the noise these batteries produce in the RF field. I bought some Hixon batteries and wanted to put them in my weather station to replace alkaline ones - but the receiption of the time and weather signals over DCF77 protocol (77 kHz broadcast here in Europe) got so bad that no data could be retrieved from that signal. Changed back to normal batteries and it works perfectly again.
That's a very specific but understandable request. I'll see if I can do a spurious emissions sweep on these next time I review this type of batteries and throw in this product while I'm at it.
@@BeatTheBushDIY nice, thank you! You got a new subscriber so I'm not gonna miss it ;)
@@BeatTheBushDIY These batteries will block MW/AM signals due to the noise generated by the stepdown circuitry. I use my Hixon batteries only for electric candles.
@@richardmerriam7044 Ahh, someone with RF issues? Yep, I tried some EBL branded ones in my portable transistor radio. Completely knocked out both AM (MW) and FM! I complained to EBL and they refunded my money! Oh, just hold one these Lithium batteries up to the antenna of an AM radio and tune the dial.
Thank you for the details
Excellent explanation, I have the TenaVolts.
Very cool thanks for the explanation
I don’t know if it still happens but batteries were always advertised in days gone by at their 10 hour discharge rate. All earlier batteries have a higher capacity if discharged slowly. Good for advertising how good your batteries were as most people didn’t know that.
Great information. Thanks for making this video.
Glad it was helpful!
Well done!! Great informative video, thank you.
For low drain applications like remotes, I never use alkaline. They leak and destroy your equipment. I use non-rechargeable lithium cells. These last forever (about 10 years or so) and never leak. Alkalines should be forbidden.
Thanks for the explanation.
They are also great for low temp usage.
Huh... Now that I look at it, operational temperature range of li-ions are a bit wider than Alkaline batteries. Excellent comment!
Nice! How long have you used these batteries? Any fails?
So when are they not suitable (because of the switching noise)? My flash unit definitely don't like them, and it even says so in the manual not to use.
For products that are sensitive to noise. This can vary by product design. This has to do with the voltage ripple under certain loads and how much a product can tolerate and still function well.
I've been fascinated with these li-ion batteries for some time now... why do they say that we aren't allowed to put them into NiMH battery chargers? I thought the chargers all just give a 5V 2A input so it should work vice versa right?
I have a modded "toy" that I added a 5V 1A USB-C charger to and is wondering if these batteries work for it...
Internally Li-ion and NiMH charges at different voltages. There are internal circuitry that makes the 3.7V nominal Li-ion battery appear like a 1.2V and how they charge it depends how they designed the charger/battery system.
It is the input I the charger that matters but the output. The input of course is 5 V as it is USB. This is a completely new and different technology so I do not see why anyone could have an expectation that one could use old chargers.
for some reason these liion batteries didn't work with my Godox TT685II-C flash, the recharge was twice as slow as using Eneloop Pros, both newly charged. Is there some reason as to why that is the case?
Charge rate differ based on the charger. If you charge 4 at once, this might make things slower since the power supply cannot supply that much energy all at once.
@@BeatTheBushDIY Hi, sorry i didn't specify properly. i meant the recycle time of the godox camera flash was slower using lithium AAs compared to Eneloop Pro NiMH. just wondering why the *recycle time* was slower? cheers mate.
I have an XTAR VC4 charger, which can charge 18650's and AA's etc, will that be able to charge these batteries? I mean if they're basically just Li Ion inside...
No. That charger is meant for NiMH and regular Li Ion 3.7 v batteries.
I'd love to see you do a video on the coast Zithion-X batteries. They are very similar I think but they mimic an alkaline voltage curve as you mentioned you would like in your video.
Noted and looking into it. Thanks for alerting me to this cool battery.
@@BeatTheBushDIY I would also like to see a review on the Coast ZITHION-X.... I've been looking at buying some envelopes Ni-Mh for some flashlights and discovered the li-on 1.5 batteries and Coast seems to be the newest & greatest
The other advantage of these batteries is they don't leak, unlike alkaline batteries that area prone to leakage when discharged.
@@AdamHelb I've been using mine 4 months now and still happy with them. This style needs to catch on.
Great explanation.
I like the fact there is low power simulation instead of just go to 0% for Xtar.
Do you find other battery brand with more slope down to indicate low batt?
I haven't seen one that does this just yet.
I want to see a teardown video of these and also view output noise on oscilloscope
More than a few have asked for this. Noted. Noise will depend on the load if/when I get to doing this test.
How do you like these vs. Tenavolts?
Tenavolts seems to not have a slight drop in output voltage to warn of low battery.
From 3,7 V to 1,5 V? How? How? How? I want see it inside.
Is similar to what is called a buck regulator. It down converts a higher voltage to a lower one. Except in a battery, it needs to be ultra low quiescent current and needs to sense a high voltage for charging purposes.
I think the lack of voltage discharge curve is a good thing.
Depends on what you want. Gradual decrease in voltage can be an indicator of charge.
@@BeatTheBushDIY Full power for longer is more useful, while you don't know how much power is left, you have the device working fully, all the time. Also you can always have some spares in case.
looks great for use in xboxone controllers
hehe. finally found the lifepo4 batteries. i just charge mine with a bench power supply. since theyre basically exactly double alkaline voltage, its pretty easy to bridge 2 contacts or change the batteries from series to parellel with a wire and a spacer or something in the battery compartment. I think i end up getting about 70% of capacity as alkaline batteries. they are a little bit hard to find, had to use weird words like "solar AA battery." found some "9v" which were labeled lifepo4 but ended up being 2x lipol @8.4-ish volts. close enough...
I may have missed something, you never explained why it's not worth it unless absolutely need it.
The Batteries are about 8 ea CAD amd can be used 1200 times. Equals $0.006 a battery in its lifetime. Vs Duracell is $1.00 each if you buy the 30 pack from Costco.
Seems like a no Brainer.
You can't use it in multiple places at the same time. Li-on degrade over time. They tend to get lost over time.
For a device that has low usage such as replacement once a year, you may only replace it 10 times in its lifetime. Hence leaving an $8 battery in there doesn’t make sense. That’s $3.50 vs $8
Nimh only have 1.2v
Agreed
They don't leak but can bust into fire.
Look for Kerry Wong
Waste of money for me. I wanted them to use them for a single Led flashlight, and after 1 minute of use they get freaking hot and they cut off power.
Paid 20$ for 4 and 15$ for a special charger. A new flashlight with 18650 battery would be cheaper
Is the flashlight intended to use 1.5V cells?
@@BeatTheBushDIY yeah works fine with Alkaline ones.
Maybe one battery is completely drained and another is not, leading to excessive current transfer. Or the cell could be faulty.
What is the difference of L4 and LC4??
Great Vid! I was wondering how they got 4V Li-Ion down to 1.5V. Thanks for solving the puzzle for me.
Glad I could help!