Review of 18650 2 channel Lithium Battery Capacity Tester, Charger and Discharger | WattHour

This 2ch 18650 Lithium Ion battery tester, capacity meter and charger.
Fully tested and explained. This video is presented in two parts. First a very quick explanation if you don't want to see the tests. then Jump to 2:30. If you want to see full explanation, then jump to 6:19.
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The DC Current meter (ammeter) shown at 24:00: • Review and calibration...
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Use chapter to jump to different section of this video
00:00 Start
2:31 Quick Learner
6:19 Hardware explained
11:20 Settings Explained
22:02 Setting Language
22:26 Current consumed by this meter
23:48 Discharge Current measured
29:13 Auto Mode test (2 hours shown in 2 min)
30:42 Discharge in 2h33m (shown in 2 min)
31:16 Conclusion remarks
Test: Discharge (Capacity)
Test: Charging for long time
Conclusion remarks
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[@thisisyourcaptainspeaking2259]

Fantastic review, you left me with zero questions.

[@zfelix3804]

thank you watt hr. you have really furthered my electronics career ! You da man

[@TheTomcatUK]

One of the most detailed reviews I've seen in a long time. Thank you.

[@WattHour]

Glad it was helpful!

[@ddavid2]

Thanks for sharing your experience!!

[@hermanbril2682]

Great review! Clear and even I could understand it all. Thanks for this. I ordered the 2 channel version🙂 I have about 22 batteries of 18650 and don't want to wait. You have a great way of teaching.

[@WattHour]

Glad it was helpful!

[@clubedoalcool]

Thank you.

[@pault6533]

When the powerbank discharge ends, it continues the test for Test 1 cell if installed. So the reported capacity will be the powerbank plus the test cell. It appears there is a diode on Test 2 USB-C input to ensure a one-way current operation. • I am using version 3.0 without the ON/OFF slide switch. They added the function of charging the cell on the left "power supply battery" when 5V is supplied to the left side USB-C. A red indicator shows charging, which goes out when the cell is fully charged. • The operation is otherwise similar to 2.0. Unfortunately nothing new was added (I wish for charging to 4.35v or changing current) • I hooked the unit up to a fast charge power charger, and it did not turn on higher voltages like 9V or 12V. Only 5V was requested. • For either version, it's nice that the cell on the left provides uninterrupted power if the charger power supply is interrupted. • What is the character to the right of the loop number? I could not get a translation.

[@ArielBaravalle]

thanks , good video , Do you know if there is any alternative firmware? It seems to me that you can get much more out of this hardware, adding graphics for example.

[@ishtiaqueahmed903]

Hi, I got this today which I ordered from china after watching your video. Cost me 432 Taka (around 4 USD). But mine is slightly different than yours. There is no on/off switch. And mine is version 1.2, while yours is version 2.0 and the model is mentioned as ZFX-CF2001. Manufacturing date is: 2023.07.24

[@erevan14]

What I did not understand is how to discharge a power bank. More precisely, up to what voltage is the discharge carried out? Does the discharge limit set between 2.5V and 3.5V remain valid for the power bank?

[@LeelooMinai]

Is there any way to change the current at which this charges batteries or it always tries 1A? Asking because I was wondering if this could be safely used to charge smaller capacity batteries.

[@ShimonBatson]

Thanks for your videos...As you showed here the voltage reading drops by 0.3-0.5v when start discharge, and jump up again to the real voltage when stop discharge. (same as in my unit...) I wonder how can we trust the capacity result if it stops discharge at 3.0v on the screen - while the actual battery voltage is 3.3-3.5v?

[@WattHour]

hi, that is normal. we have Open Circuit Voltage which there is no load you will see different volage. When you connect laod you will the voltage drops a littel see more there en.wikipedia.org/wiki/Open-circuit_voltage . The capacity is measured when there is load and that is measuring actual capacity. My tests showned that Discharge capacity is is accurate with 5%. But this module does NOT show the charge capacity. See the 4 channel kzbin.info/www/bejne/bYm3Z36MpLCZjZY which is much better.

[@ShimonBatson]

@@WattHour Thank you very much for your kind explanation!

[@abhamid55]

Thanks for your video. But what about the internal resistance?

[@WattHour]

if it has that feature then I have explaine it. I never skip any feature of a product.

[@abhamid55]

İn the video (9:10) you said that the measurement of the internal resistance is not accurate. Do you confirm that we cannot relay on this device to measure internal resistance.?

[@damanidasilva8530]

I was looking for a link to the 4 digit ammeter that you were using and didnt see it. Could you post link pls.

[@WattHour]

Thank you for letting me know. I added the link in description and here is the video kzbin.info/www/bejne/fmHTgoSufrqeb7c

[@user-hv9de4qg4h]

Hello from Canada.thank you for all your videos.I have a two 24 volt 25 ah reongy lifepo4 battery.which can only be run in parallel not series or I’d have my 48 volts. I am looking for a dc to dc booster to turn my 24 v to 48 v. from there it feeds into a 48 volt brushless controller.model# 4t48zwsrm-gh04q. rated current 9a,maximum current 18+1a,speed limit 1-4.2v,brake input:low level,low voltage protection 40v+0.5v. From there feeds into bafang 48 v 500watt hub motor. Can you or your viewers please recommend a boost converter to Change battery from 24v to 48 v and that will work safely with the controller and motor. I am doing my best to figure it out myself but my brain and math/numbers don’t work so well together. My fear is damaging my controller/motor using the wrong converter or it not working properly. I have a bpm imports fat tire trike 500 watt 48 volt. You can not find these trikes in 500 watt because bpm Canada never got off the ground due to Covid. The USA versions come in 750watt and up. Thank you again for all your great videos. Happy Monday to ya.

[@NickB2513]

What is an acceptable internal voltage range? mR ? For example, I have a fully charged battery and its saying 00101mR.

[@uniquegamingduo9872]

less is better

[@oleksii.zagorskyi]

24:00 I could not find review video for the accurate Amp-meter you mentioned.

[@WattHour]

The ammeter link added in description and here again for you kzbin.info/www/bejne/fmHTgoSufrqeb7c

[@ddavid2]

I'd say this is one channel, because it can only charge/discharge one battery at the same time, in the opposite to the other really "4 channel" device you already reviewed.

[@WattHour]

this is 2 channel but can check only ONE channel yes. please watch. you can check the capacity of your battery bank or external battery pack with USB .

[@ddavid2]

@@WattHour for me, N channels mean that they can be simultaneously used. But yes, it can be a matter of perspectives.

[@pault6533]

If you buy the newer version 3.0 without the slide switch, it does indeed act as a two-cell charger. However charge data is only reported for the cell in the right bay. The left battery is not tested for discharge.

[@ForwardGuidance]

Question that keeps nagging me so I hope someone answers: Lithium-ion charging, it is CC the CV. To do it manually, for a 12v/20Ah, 3s pack, is it as simple as setting AMPs constant to, for example, 3 AMPs then set the voltage to 12v and let it charge to 12v then bump up the voltage to 12.2 leave current at 3A and let it charge to 12.2 and then bump up the voltage to 12.4 leave current at 3A and let it charge to 12.4 and then bump up the voltage to 12.6 lower current to 1A and let it charge to 12.6. Would that work? I'm just wondering, can it be done manually if one has a voltage and current adjustable DC power source? There are a lot of chargers on the market that are programmed to do this, but can it be done manually?

[@damanidasilva8530]

Can you hard wire a battery higher than 5v to test it capacity like say a 2, 3 or 4 cell battery.

[@WattHour]

No you can't.

[@thisisyourcaptainspeaking2259]

You can externally regulate the higher voltage power bank to 5v but in that case the result still will not reflect step-down conversion losses.

[@fauploads624]

I need help regarding a problem in LCD screen of this module. During first use the screen was all good but after some time the screen lost its contrast and looks whitish though its still readable but it annoys me. Any help would be highly appreciated.

[@WattHour]

something is must be wrong as you said it shows info but dim. Check the connectors soldered .

[@fauploads624]

The LCD screen connectors were good and i resoldered them. I will try to resolder the other components as well.

[@ComputerTechNL]

They says it can also check other battery with other holders

[@WattHour]

you can charge any Li-ion battery which has the same voltage. Of course you would have to find a way to connect them.

[@ZebbMassiv]

Hmm my version doesn't have an on/off switch.

[@user-rx4vs3kk4i]

how did you get it out of chinese and into english?

[@WattHour]

please watch.

[@Francesco_P]

Anyone knows how long does It take to discharge a 3500mah?

[@WattHour]

Hi, What did show then? I showed and explained how to calculate. You may watch the 4 cell version and I might have explained differently there kzbin.info/www/bejne/bYm3Z36MpLCZjZY

[@remonako]

I can't switch language

[@bmfilms5885]

Found this on aliexpress: "Power off, then press and hold down the menu key to power on at the same time, release the menu button, at this time, the English interface will be displayed, wait 10 seconds for the system to save, save the data, then shut down and restart, in this way, the switch to English." Worked for me, had the same problem.

[@oleksii.zagorskyi]

Check title. 2, not 4!

[@WattHour]

Thanks. fixed it.

[@DemaamEditz]

ada link ijo ato oren nya gan ? 😅😆😁😃

[@WattHour]

English فارسی ؟

[@basimrasheed9]

xie xie ni hao yun

[@homegeographic5351]

1 chanel. Not2

[@DrHouse-zs9eb]

So this isnt a 2 channel! You cant measure both channels at once.

[@repairman2be250]

Tested 10 cells (18650) have a capacity between 1500 - 1700mAh out of the advertised 3500mAh. Underwhelming product claimed as being Original 18650 HG2 3500mAh - brown sleeved. _A v o i d: ->Sho p1103577373 Sto re

[@2626sylver2626]

I give you 👎 because you deleted(and you are saying full review)the part where you change the menu from Chinese to English

[@WattHour]

when you dont' watch and skip, this happens you get angry at yourself.

[@thisisyourcaptainspeaking2259]

I saw he clearly explained how to toggle display language.

[@jamieclements9229]

​@WattHour@@thisisyourcaptainspeaking2259 thanks for the video, it helped me to change language on my device. If it helps other people has no ON/OFF toggle the method change language is slightly different and I used your video as a guide and discovered this can also work make sure unit is turned off press and hold middle button press left button to turn on