Introduction to CellMeter 8 Lithium, Servo and ESC Tester

[@bernfranfrancis3012]

Thank you for the very good lesson on how to use this. I have had this for 2 years but never got around to seeing what it can do beside check cell voltage. Very well presented and at a good pace.

[@robojax]

You are welcome. I am pleased that you found it useful.

[@Helilifter1]

Very thorough explanation, it clarifies the instructions that come with the unit which is a little difficult to understand.

[@dirtrider88]

5:30 when i hold down the mode/discharge button all that happens is "discharge" shows up on the screen and 1s and 2s along the top start flashing (2 cell battery). i assume its discharging?

[@DarkLordHavoc]

Thank you for this review video. I just got a CellMeter 8, and had a hard time with the instructions. Your video demonstration really cleared things up for me, and now I understand how to use this properly! Thank you!

[@robojax]

You are welcome. I am pleased that you found it useful.

[@joserrodz]

EXCELLENT INSTRUCTIONAL VIDEO!!! NOTHING BETTER THAN A PRACTICAL DEMONSTRATION ALONG WITH YOUR DESCRIPTION TO ELIMINATE ANY DOUBTS ON THE METER FUNCTIONS !!

[@steelydanfan100]

Nice video, I am beginning my RC airplane journey, knew this device was good and ordered it. The instructions are detailed but cryptic, with Chinese English to muck things up some more. Your video filled many missing gaps , I will figure out the rest thanks to you, sir. Job well done.

[@robojax]

You are welcome. Yes RC and Most of product you get from eBay or DX.com or AliExpress they have not manuals.

[@mickistevens4886]

Same here! Very helpful. It would take me hours to learn from the broken english in the paper instructions.

[@jrotor3301]

I’ve had one of these for over a year and all I ever used was the meter to see the individual cell voltages, didn’t realize I could do tons of other things too, thanks for the informative video👍

[@robojax]

You are welcome.

[@kdiggs23]

If you hold the cell button, mine goes into the balance function. Then one tap of the cell button starts the cell balancing. I use this function the most, by far. Keeping the cells balanced really extends the life and capacity of the battery over time.

[@Cityboy4x4]

I got the cell meter read the information sheet but had no idea it did all this. I'm happy I got this one. Thank you for this video.

[@robojax]

You are welcome. I am glad you found this video helpful. please subscribe. Thank you for not skipping the ads and keep watching them. This will help me a lot.

[@ScutuRC]

Perfect! Thanks for the introduction .. much easy to understand than reading the manual :))) Now I'm ready to fly, crawl and bash around the world in my RCs...

[@74DuallyVan]

Very well done video. I didn't know about the setup menu thats cool just discharge and cell test is all I do. Now I don't have to hear a beep anymore yay!

[@ruikade251]

Nice video! I never thought my cellmeter 8 can do all of this.haha. have a nice day!

[@rcjunkie260]

Thank you for the lesson I needed it. Just started using mine to test some old servos. I could not find my instructions.

[@flymachine]

THANK YOU! Mine arrived from France with no English instructions and the model I bought with it had dead retracts, only be taking video of me checking the retracts with this tester was I able to prove to the supplier that the model is faulty and without your instructions, I would never have figured it out and possibly would never have the faulty airplane issue resolved either! I bet you never made this thinking some guy in South Africa would get his refund because of my video? ;)

[@robojax]

You are very welcome. I am glad my video saved your refund. Stay safe. Greetings from Canada.

[@rustyalford6286]

Excellent tutorial on the CellMaster!! I have it but didn't appreciate it's capabilities! Thank you.

[@robojax]

Glad it was helpful!

[@Notreallyhillbilly]

Exactly the video i needed. Great work!

[@carlos64030]

Thanks for this review! I was primarily interested in how you can check a servo with this checker.

[@robojax]

Glad it was helpful!

[@DanielCValot]

Thank you for your video, it really helped me understand how to use this tester

[@robojax]

Glad it was helpful!

[@CarreraGTSCS]

What a great tutorial. You made it very easy to understand. THANK YOU!! Subscribed!

[@robojax]

You are welcome. good to hear that. Thank you for subscribing.

[@bigchungus-oj8zz]

Thank you sir! I appreciate your help in further understanding how to use my CELLMETER 8. Prior to your video, I only used it to check batteries, it's my favorite battery checker...

[@robojax]

You are welcome. I am glad you found this video useful.

[@KenKneknaneek]

Thank you for the information. The English was so small it was hard to read and understand. Your explanation was perfect, thank you very much .. Happy Flying

[@robojax]

You are welcome.

[@ubreakitirepairit3569]

When you press and hold the mode button to discharge a battery, is that the same as balancing it / storage mode? Should balancing be done after using a battery or after charging a battery?

[@capnhardway]

I can't seem to make the beep louder?

[@Orvis25]

I have a question. There are other versions of these, and some can measure the internal resistance of the battery packs. If I hook up a battery holder, would this check 18650 lithium ion cell and 1.2v nimh aa/as cell resistance? Also, have you done any comparisons to manually checking (using the voltage drop calculations) and see if they are similar?

[@robojax]

it does not doe resistance check. it just checks the voltage.

[@russellwilson5246]

hi thank you..can the beep be used for low and high voltage alarm?

[@user-rx8qq8sk9ydv1ce5ib]

Thx for the video. For servo testing purpose, what kind of battery to use to power the device if I don’t have an ESC or BEC (I don’t know what BEC does)

[@lungocicorneliu1119]

Super review , congrats !

[@maskthefirst]

Hi there, When I try to test Motor (all 3 modes, Manual-Center-Auto) there is no Motor Rotating. After couple of try I realised this ; if I set the Cellmeter 8 about 1300 ms (still there is no RPM on the motor) and disconnect the Cellmeter and Re-Connect it, motor test start to work (all 3 modes, Manual-Center-Auto). As i watched your video "Motor Test Function" sould be ok without this "Disconnect and Re-Connect" action. Do You think there is a problem about mine? TIA

[@JG-hi6by]

Thank you this video is very helpful

[@robojax]

Glad it was helpful!

[@eduardoserrano5453]

Very good video, you explained it very well. Thank you.

[@cbezanis]

Very thorough review, well done!

[@robojax]

Thank you Chris.

[@colinmorand129]

Thanks for the upload on this

[@robojax]

No problem!

[@GStrauss]

i, , can I go below 2.0v per cell with the discharge? I would like to discharge completely old lipos

[@robojax]

Hi, no you can't . Lithium batteries get permanently damaged if you fully drain them. That's why chargers have "over-discharge protection" which I have explained here with this Lithium charger kzbin.info/www/bejne/Zp6yoqN5m6aXr5Y you will learn a lot about Lithium chargers if you want.

[@GStrauss]

@@robojax thank you for the reply. So how would you suggest to discharge the Lipo to zero before throwing it to the trash?

[@robojax]

You are welcome. just connect a DC bulb like car bulb or DC motor.

[@Ziplock9000]

So the CM7's balancing by holding TYPE has been removed on the CM8 and you have to use discharge instead by long holding MODE. Meaning you need to specify a voltage which you didn't need to do on the CM7 as it tool the voltage of the lowest cell?

[@capnhardway]

I couldn't figure the discharge on the 7 that's why I got the 8. I'm a Newby so I want to try to do it right lol, thanks for the video, still looking 😂

[@DroneSyndrome]

How do you balance each cell on a lipo battery?

[@robojax]

Balancing is done by the charger/balancer. this is tester and discharger.

[@DroneSyndrome]

Robojax Oh ok, I saw someone mention on their video that it had a balancer function but they never showed how to perform it. Thanks for letting me know.

[@stereojos86]

Can two be placed in series to measure a 13s battery?

[@robojax]

I am not sure. this is very unusual.

[@peterbridger8464]

Many thanks for your informative review. I have the Cellmeter 8 and it is very useful. The only issue I have is the servo tester. I set it up, exactly like you, using a lipo 3S 2200mah and a 30amp ESC with BEC but at the time of plugging in the 'battery' connection, a continuous alarm sound starts and none of the information on the screen is shown. I have checked the plugs that go into the "servo power in" and "servo test out" to ensure they are the correct polarity. Do you know what I am doing wrong please. Would appreciate your thoughts. Thank you. Peter

[@robojax]

You are welcoem. these inputs are simply 5V. the alarm is for the battery /cell level. so it seems the input voltage is not 5V. the middle wires red or organge is + and the balck is negative.Check the volage comeing from ESC to make sure it is 5V.

[@peterbridger8464]

@@robojax Thank you. I appreciate your reply. An oscilloscope can test the voltage coming from an ESC but I don't have one. I thought most rc esc's have a BEC. I tried many esc's that I have but they all set off the alarm. I might have to look at getting some other type of servo tester. All the best.

[@sciencetechro9701]

Hello. Can it be used to monitor the battery from the smartphone? The battery can not be removed from the phone. Can be monitored while discharging the battery through usb or other method by this controller you present? Or other product that can help me. Thank you.

[@robojax]

It is possible but not with this device.

[@sciencetechro9701]

@@robojax can you tell me a device that can show me percentage will discharging?

[@jasonbrown467]

lol you again!!. your videos helped me on using my buck converters, now i am watching this to see if i can see all cells voltages at the same time on this device. im building a lipo for a ebike. i see i cant see them all at the same time. dang it

[@robojax]

I am glad we met again. LOL. I hope you have subscribed. I appreciate it.

[@jasonbrown467]

@@robojax i have accidentally found your videos too many times to not have subscribed, so i did last night. i really wanted a unit that would display each cell's voltage at the same time, and i did, and it wasnt that much more than the one in your video, but i couldnt tell you any more than that. www.amazon.com/gp/product/B08X718GJP/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 i want to check balance out in the field and my memory is too poor to remember all the voltages as i scroll through them. anyways thanks gain

[@em3-46]

is there a way to apply 8volts to this to check high voltage servos?

[@robojax]

NO. Power up your servo with 8V and get only signal and ground from this.

[@rccvs4355]

Great video, I have the same, never check my servos, where did you get that 5v input power from? Thank you !!

[@robojax]

5V is 5V does not matter you get it from. You can get it from any USB either a charger or a computer.

[@rccvs4355]

Perfect thank you for your input 👍

[@monkeytrident]

@Robojax nice video perfect for servo testing, Can it be used to check lipo internal resistance ?

[@ErickeGallardo]

Can we use this for Lifepo4?

[@robojax]

Yes you can.

[@carlnikolov]

how did you make that input power for the three pin connector?

[@robojax]

when you connect servo to the left side, it gets power from the meter. You would have to connect as LiPo battery on the right side and that is where the power comes from.

[@renieljunio776]

is this can be used to discharge for nimh batteries?

[@robojax]

No. it can't. use this kzbin.info/www/bejne/bamUq3Vpi8iLZ6s

[@nnsense]

Hi, is this working with Tinyhawk batteries, 1s 450mAH ? Thanks

[@robojax]

Hi, this will measure and gives you the values for the battery. yes it will read the value. But if you want to turn ON a servo motor, then you need 5V for the servo.

[@ahmetnurikok5674]

Thank you for your nice narrative. Can we test lithium ion 18650 3000 milliamp batteries with this instrument and how many batteries can we test at the same time?

[@robojax]

you are welcome. just one battery of 2S, 3S and 4S.

[@garygullikson6349]

I ordered CellMeter 8 from Amazon, did not work with original AOKoda small black module and bulb harness fast discharge setup, neither did replacement CellMeter 8. Might work with "exposed" type module. There may be original and counterfeit CellMeter 8's. My Hobbymate "portrait"version, with black AOKoda module, fast discharges lipos very well. Amazon sells "ALLRAY" 24 Volt, 50 Watt replacement bulbs, cheap.

[@pugalstech]

Thanks for verygood demo

[@robojax]

You are welcome.

[@deepx77]

Good video! One question. Can I use this device to balance/discharge my battery with ONLY the balance connector/lead? My power connector on the battery is not a common one and doesnt fit any charger because of the weird design. (Absima 1/16 truck comes with a weird 7.4v 500mah 2cell battery)

[@robojax]

I am sorry for late reply. I was on vacation. Thank you. Yes you can discharge.

[@trochios]

To discharge the battery I think you need to buy separately a Discharge Module which has some strong light bulbs to draw the battery

[@robojax]

Yes.

[@salvuccio1976]

it is possible calculate speed of the servo?

[@robojax]

no. not possible. Reaction of servos are not standard.

[@xwatchid]

So it doesnt display the capacity.

[@marekvselicha7093]

Hi, thanks for your video. quick question - where can I get the 5V battery (with the appropriate plug) to be able to use it for servo testing? Also, what happens if I insert higher voltage in the Servo 5V input? Thank you!

[@robojax]

Hi you are welcome. The servo usually dies. the 5V can be take from any charger or USB. All usbs are 5V.

[@InvisiMan2006]

Will this tell you the current draw from servos?

[@robojax]

NO.

[@justapropfpv2137]

Thanks for the video!! Helped allot!!

[@robojax]

You are welcome.

[@jps99]

Thanks, well done tutorial.

[@robojax]

you are welcome. Thank you for not skipping the ads and keep watching them. This will help me a lot.

[@TonysRcTechboom]

Great tutorial video my friend 😁I have liked👍 and subbed you because I think I can learn a lot from your channel thank you. 👌🤘👍👊

[@robojax]

You are welcome. I am glad you found it useful. Thanks

[@TonysRcTechboom]

Oh I did brother, my came yesterday and I think it's great and everyone should have one. Thanks my freind 👍👊👍👊

[@HGFHY]

Internal battery Resistence tester ?

[@Sean-Aviation]

Thanks for the video. very well made. I didn't have any success discharging with this unit. It made the off balance packs worse and also discharged beyond the programmed threshold. did you guys have a similar issue?

[@robojax]

You are welcome. I have not discharged a battery practically. Don't know if this issue is there.

[@websitesthatneedanem]

Very Useful!

[@robojax]

Thank you.

[@Marcos_Ledinich]

does it balance the cells ?

[@robojax]

no it doesn't. it can discharge only other than measuring voltages.

[@maskthefirst]

Nice video Thank You. I have a question about servo testing. Can i connect 3s lipo directly ( no esc) to the right bottom side for servo test ( i mean the port the you used for both discharge and measure cells ) ? TIA

[@robojax]

No you can't . it will burn.

[@maskthefirst]

Robojax thanks for the reply

[@user-hw8uh1qv4h]

Does Deans work on these?

[@robojax]

Sorry what is Deans?

[@user-hw8uh1qv4h]

@@robojax Its the T type connector, I think I would just need to use the balance plug anyway. Cheers

[@kermets]

Hello, can you just do a balance of the lipo ? the servo tester is a little jumpy did you have it set to 50H for the little Blue servo ? cheers Brett

[@robojax]

What do you mean? Balance charge? It can check cell and discharge. The discharge is very slow. for larger Lipo it might take hours.

[@kermets]

Yes my Hobbyking HK-010 can just balance the pack without having to do a full discharge ? hobbyking.com/en_us/hobbyking-hk-010-wattmeter-voltage-analyzer.html

[@KonaChuck22]

Robojax I think what he means is, can this unit make all the cells have an equal voltage level? This is accomplished during charging and/or discharging the battery on some units. For example CELL METER 7 can accomplish cell balancing by making all cells equal to the voltage of the lowest cell in the battery.

[@KonaChuck22]

kermets Does the HK-10 need an external voltage source to balance the pack? I'm looking for a balancer that can handle a 4S pack of large LIFEPO4 260AH cells without the need for a second battery.

[@kdiggs23]

You can balance the cells anytime with the cell meter. Hold the cell button, it should say bal, then hit the cell button again and it should start to balance. I have a tenergy 5-in-1, which is basically the same thing minus the servo tester, it looks the same. When you hold the cell button that brings me to where I can check the internal resistance too, it says ir. If my advice doesn't work, I still maintain that somewhere you should be able to cycle through a menu of the other options besides just discharging for lipos. PS- Thanks for the video on the HJ servo tester!

[@brautigamkimclaramarie885]

Good 👍

[@carlosw1687]

Thanks

[@yt240robert]

the best !

[@robojax]

Thank you . So are you.

[@amen_ra6926]

Unfortunate that it doesn't check internal resistance.

[@robojax]

yes it dies not.

[@J-dk3bv]

Dont buy these. VERY inaccurate!

[@flojotube]

There’s a knob here alright

[@carlnikolov]

Cool accent :p

[@robojax]

Thanks