#751
Рет қаралды 2,917
Күн бұрынI test a 1000mAh 9V USB rechargeable lithium cell to find out its real capacity.
I use my Siglent SDL1020X-E to load test the battery and record the battery capacity.
The battery can be purchased here: defs.link/?u=ae7ec2
0:00 - Intro.
0:30 - Testing explanation.
1:19 - Beginning the test.
1:30 - Battery information and considerations
2:18 - 15 minute mark.
2:36 - Cut off voltage.
3:13 - 100mA test completed.
4:52 - Completed test result.
5:35 - Patreon supporters.
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====================
My Electronics Tools (video and purchase links)
====================
Boonton
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4220.
8210: defs.link/?u=e1eddc
Fluke
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8842A:
45: defs.link/?u=eac51d
343A: defs.link/?u=13c93d
540B: defs.link/?u=0c6bd9
5200A: defs.link/?u=a43c99
5450A: defs.link/?u=3c6292
893A.
A90.
HP/Agilent/Keysight
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4261A: defs.link/?u=07ed95
5005A.
5342A 18GHz: defs.link/?u=5f7513
6181B: defs.link/?u=b12aef
8012B: defs.link/?u=ca5764
8648B: defs.link/?u=da52a3
8901B: defs.link/?u=535835
DSOX1102G: defs.link/?u=a68d39 defs.link/?u=12d498
E3646A: defs.link/?u=128f4a
Marconi
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2022D.
2955: defs.link/?u=6f6e5e
TF2103: defs.link/?u=61baaa
Rohde & Schwarz
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SMY: defs.link/?u=93514b
CMU200: defs.link/?u=8ccd72
Polarad SPN: defs.link/?u=2ead82
Siglent
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SDM3065X: defs.link/?u=1ed0fe defs.link/?u=12d498
SDS2102 (hacked to 340MHz): defs.link/?u=1ed0fe defs.link/?u=12d498
SPL-1008.
SDP1168X: defs.link/?u=1ed0fe defs.link/?u=12d498
SDL1020X-E: defs.link/?u=a0eccb
Other Equipment
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KSGER T12 Soldering Iron: defs.link/?u=620ace defs.link/?u=5c112e
Quick 861DW: defs.link/?u=138c0f defs.link/?u=a3fc81
S-993A: defs.link/?u=079677 defs.link/?u=e855a0
EEVBlog BM235: defs.link/?u=12d498
YR1030 Battery ESR: defs.link/?u=c56527
Heathkit IT-12 Signal Tracer.
Racal Dana 1992: defs.link/?u=8eeeba
Bird 43: defs.link/?u=4b18f7
Sinadder 3: defs.link/?u=2bf1dd
Audio Control SA-3050A RTA: defs.link/?u=a04df2
Korad KA3305D: defs.link/?u=69090a
PDVS2mini: defs.link/?u=869ba4
Valhalla 2703: defs.link/?u=06bcfc
Feeltech FY6800: defs.link/?u=8b98cd defs.link/?u=34d101
Eakins Microscope: defs.link/?u=b0278b defs.link/?u=262327
Mustool G600: defs.link/?u=b8bc26 defs.link/?u=33f0aa
Handheld Equipment
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Uni-T UT210E: defs.link/?u=391ce3 defs.link/?u=ea4edc
DER DE-5000: defs.link/?u=0d9160 defs.link/?u=12d498
MK-328: defs.link/?u=0d9160 defs.link/?u=739ee7
MESR-100: defs.link/?u=0d9160 defs.link/?u=009419
ESR Meter: defs.link/?u=0d9160
HOPI: defs.link/?u=7fab55
PeakMeter PM6252: defs.link/?u=59ef66
HS1010: defs.link/?u=10c699
Thermal Camera: defs.link/?u=280cca defs.link/?u=4a2256
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@Ardren 3 жыл бұрын
From Aliexpress description: > This battery has a built-in high-quality 3.7V1000mAh lithium battery. It uses its own patent boost technology to boost the battery to 9V. I don't know why they lie about these things for marketing. A 450mAh 9v USB rechargeable battery is already a good product.
@TheDefpom 3 жыл бұрын
Agreed, that is what I thought it would be, 1000mA of 3.7V lithium pack, BEFORE being boosted to 9V, like you said the capacity as actually still OK, which is why I still have a link to buy them and think that they are OK.
@kmartyCZ 3 жыл бұрын
@@TheDefpom Unfortunately, they do that this way quite often. For example power banks, most of them has stated "raw" capacity (e.g. 20Ah), not "consumable" capacity (e.g. 12Ah).
@dovpauzner5093 2 жыл бұрын
Thanks !
@ssalient Жыл бұрын
Where did you get those Banana input screw terminals for this load? I would love to have those too, I hate the standard thumb screw caps.
@TheDefpom Жыл бұрын
I found them on eBay, had the same threads so they just screw straight on. They do require a washer though as they won’t screw right down due to the threaded hole being too shallow.
@davehimlin2374 5 күн бұрын
Have you discovered any current 9 volt rechargables that have higher mahs capacity and output at 8.4 volts or higher when fully charged. ? Ty
@Microwave_Dave 3 жыл бұрын
Thanks for running that test for us, very useful information. Have you tested the maximum current output? Also will it still provide 9V while being charged via micro-USB? I wonder if it's protected against charging, in case a device tries to recharge it from the 9V terminals.
@TheDefpom 3 жыл бұрын
Microwave Dave - I didn’t want to risk damaging the battery with excessive current. But I did try charging at the same time as drawing current from it, and the charging current increased.
@Microwave_Dave 3 жыл бұрын
Good thinking. Don't sacrifice it for us.
@allthegearnoidea6752 3 жыл бұрын
Just out of interest do you know what is the claimed charged shelf life etc ? Thanks Regards Chris .
@TheDefpom 3 жыл бұрын
AllTheGearNoIdea - not yet, when I first got them I gave them a short top up charge (only for 10 minutes) and then put them away, a month later they charged in about 45 minutes, so approx 1/2 charged. I have fully charged them and will check them again from time to time to see how they go.
@msana4420 3 жыл бұрын
How noisy is the output? Could you maybe scope it with and without a load? If not noisy it would be a nice option for most multimeters
@TheDefpom 3 жыл бұрын
M Sana - I will have to look into that, the listing for the battery did state that they had a noisy output, you can see that too on the DC Load as it is jumping around.
@msana4420 3 жыл бұрын
@@TheDefpom maybe a side mission (project) hint hint...wink wink. Measure the noise floor and the noise on load. Then a few episodes of fixing that xD But yeah, I'm curious before I buy one for my meters as it seems they drain the 9v Lidl ones waaay to quickly. Have a great one!
@Hasitier 3 жыл бұрын
1000mAh might be the raw capacity of the lithium cell at 3.7v. As the voltage drops while discharging (which is good to be able to use a battery indicator) you get less and less energy per mAh out of the battery. Comparing mWh is more useful here. But besides that: does the battery cut of itself at some point? Otherwise deep discharge might be a danger.
@TheDefpom 3 жыл бұрын
Indeed, that is the assumption in regards to the battery. I haven't tried discharging to find a cut off voltage, when I go to use the batteries I will find that out.
@Hasitier 3 жыл бұрын
@@TheDefpom ok please Tell us if you found that out. Otherwise they look promising.
@feedback-loop 3 жыл бұрын
Yeah, I measured around 600mAh when I tried a few types (with no boost converter) some years ago (just checked, that video was published in May 2016. Time flies). I would think there is no way to pack more than, say, 700 into this volume given the state-of-the-art energy density of Li-Poly chemistry. The boost converter will inevitably waste at least a few %.
@TheDefpom 3 жыл бұрын
They don't replace a traditional battery in a low draw device as it would self discharge too quickly, but in medium and higher discharge devices they would be fairly good I think. I think even 500mAh isn't too bad really, and is probably more than most standard batteries in reality, a quick google search shows a typical 9V cell having between 310mAh and 450mAh of capacity using a cut off voltage at about 6V, I just found this which looked interesting: www.powerstream.com/9V-Alkaline-tests.htm
@mre3820 3 жыл бұрын
Big clive said that some of those had two cells inside @500 ma but one wasn't soldered correctly
@TheDefpom 3 жыл бұрын
Mr E - if that were the case in this instance I would have only got about 250mAh of capacity on the output.
@Bodragon 3 жыл бұрын
The 3.7V lithium cell inside may be rated at 1000mAh But would drop as the output voltage is increased. Should rip open battery and see what kind of lithium cell is inside and perhaps do some further tests. >
@TheDefpom 3 жыл бұрын
Bodragon - I don’t want to destroy it, I want to use it.
@Bodragon 3 жыл бұрын
@@TheDefpom If you wanted to keep and use it, you could. Opening it up for inspection need not totally destroy it. If you're careful with your Dremel and you've got some suitable glue at hand, the battery would be perfectly serviceable afterwards. >
@Bodragon 3 жыл бұрын
@@ecospider5 I also think batteries should be rated in Watt hours,which is a function of both voltage and current, rather than Ampere hours which does not take into account the voltage. Of course, an average voltage would need to be applied to these ratings since the voltage is in continuous decline. >
@cambridgemart2075 3 жыл бұрын
I'm curious as to my it's marked as 1000 Mega Amp Henries!
@TheDefpom 3 жыл бұрын
Yeah, seems they left the CAPS lock on...
@TheRadiogeek 3 жыл бұрын
The Chinese lied about the capacity of a battery’? Shocking!!
@TheDefpom 3 жыл бұрын
Well, kind of, the value of 1000mAh is probably the actual lithium cell capacity, but due to it being boosted up to 9V it halves that, plus the losses of the boost converter.
@zx8401ztv 3 жыл бұрын
Hmm most batterys don't have a capacity stated on them, so it's difficult to know what to expect. I would have thought a 50 mA constant drain down to a cutoff voltage of 7 volts would be fair. Maybe a alkaline pp3 from a supermarket would be fair discharge comparison. I also expected the voltage to stay above 7 volts :-(
@TheDefpom 3 жыл бұрын
zx8401ztv the official cut off voltage for this type of battery is 6V, at least according to Mr Google.
@zx8401ztv 3 жыл бұрын
@@TheDefpom , i must have higher standards than google ha ha :-D. I did expect the built in boost circuit to keep the voltage a bit higher. Have you ripped it apart yet?, you know you want to ha ha :-D
@TheDefpom 3 жыл бұрын
zx8401ztv - yeah I want to look inside but I also don’t want to destroy the battery, I’m so torn.
@brasscog8890 3 жыл бұрын
Damn it's late been waiting
@TheDefpom 3 жыл бұрын
Yeah, I'm only 17 hours later than normal.... I hope you got a toilet break.
@brasscog8890 3 жыл бұрын
@@TheDefpom Day behind you now a day late. CST US
@chefbink61 3 жыл бұрын
Yeah when I saw them in the mail bag I said to myself,,,, yeah sure,,, there're 1000mAh,,,, not!! I am surprised that the voltage drop so fast seeing how they are using a boost converter.
@TheDefpom 3 жыл бұрын
Dr Nicktu - yeah I never trust the numbers on items from aliexpress, sometime they are correct, sometimes it is a twisted statement (like in this case, where the 3.7V packs likely total 1000mAh).
@CDN_Torsten 3 жыл бұрын
I truly don't understand where one of these batteries would be used. They self-discharge quite rapidly due to the boost regulator constantly running... Unless one has a high draw device which would typically burn through batteries daily, using this product in a device with a low power consumption and infrequent use would be frustrating.
@TheDefpom 3 жыл бұрын
Torsten Tiedtke / once my current multimeter or LCR meter dies then I will be using one of these to see how long they last. As the purchase price for one of these batteries is the same as a normal battery to me it is worth a shot, even if it only lasts a month or two between charges, they only take 2 hours to recharge.
@CDN_Torsten 3 жыл бұрын
@@TheDefpom Here in Canada, the rechargeable 9V cost me around 8x more than a standard 9V disposable...so difficult to justify especially since most 9V batteries last a year or more in a DMM. I'm currently monitoring a fully recharged battery to see how long it last just by sitting on my desk. I lost 1 bar of charge within the first week... Looking forward to your findings in the DMM / LCR meter !
@TheDefpom 3 жыл бұрын
NZ’rs are overcharged for most items, they are hugely overpriced compared to what you would pay overseas, like I said the rechargeable battery was the same price (in some cases actually cheaper) than a name brand alkaline battery !
@CDN_Torsten 3 жыл бұрын
@@killaken2000 This looks like a workable application. Typical primary 9V batteries are rated at 500-600mAh...so this product will work similarly for you. With 2 batteries, one could be charging while the other is in use.
@TheDefpom 3 жыл бұрын
killaken2000 - I think in your case it would be well suited to the job because of the current draw, UNLESS it’s output noise gets into the audio.
@abeleski 3 жыл бұрын
Da batrds 🙂
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