Turnigy 9X TX $8 Li-Ion battery Modification $8 Lithium Transmitter - DIY Eurgle

[helipassion]

outstanding lighting in your video. Thumbs UP!

[BMSWEB]

@helipassion Thanks for the feedback and noticing the lighting. You're the first to acknowledge it :)

[gtidonavan]

My batteries just arrived.. Is this mod safe to use with FRSky DIY module installed? And The LCD backlight from Hobbyking?

[BMSWEB]

@gtidonavan I don't have the LCD Kit on mine but I do have the FrSky DIY Installed. I don't see why it wouldn't work. Many people have all three. Just take your time and make sure you visit the rcmodelreviews website and have a read through his explanation of this mod.

[TheDyess]

I have the ER9X firmware installed in which you can set the low voltage alarm to anything you want (4 volts for example). So I could probably just install this battery without putting in the extra resistor. I didn't even know that a 3s lipo could damage the Tx because the voltage is too high. Will have to think about getting this battery and replace my current 3s tx lipo.

[BMSWEB]

@TheDyess If you're running ER9X then there is no need for the resister at all. I've had a number of reports about 3s lipos causing damage to the 9X. For what its worth my 9X with this mod runs like a dream. I only charge it once ever couple of months or so, it's a great mod that RCModelReviews came up with.

[SaToMojo]

i found the answer with ur next video.. thnx...& BTW i did thumb up & subscribe.

But still i wander if ur 8.2k resistor is a 1/4 watt or 1w?

I need to buy a new Eurgle 9x because of a 3s lipo that screwed my electronics.

[BMSWEB]

@SaToMojo It really doesn't matter at all. I'm using 1/4watt for mine.

[SaToMojo]

Great video, it brings the question of how & where would you put the balance plug on the battery.

[BMSWEB]

@SaToMojo I show the wiring of the balance plug in another video. have a look at the one that shows you how to charge this transmitter.

[asennad]

I do not believe this mod is worth the effort. I have been flying with the $8 battery pack for several months now just letting the low voltage alarm go on beeping. Just tonight I completed the mod on the transmitter - successfully. However I believe the hassle and the risk of screwing up the is Tx too great to justify saving a few bucks on a proper lipo pack and I doubt the lower temperatures/voltage and will have any real effect.

[BMSWEB]

@asennad I can only comment on the two radios we have here and my friends who I've done the mod for all of which are very happy with it. I wouldn't recommend anyone doing the mod if they are concerned about damaging the Radio or lack confidence in soldering etc

[yousername78]

Can the mod be done to the hobbyking HK-T6A V2?

[BMSWEB]

@yousername78 I have no idea as i've never looked at the HK-T6A. If its a copy of the 9X then I would say yes but if its a different radio all together then I don't think so

[vineetaquarius]

what is the need of modifying the logic board , for the voltage ??

[BMSWEB]

@vineetaquarius Its all explained in the RCReviews website. You're basically just tricking the unit into thinking the voltage from the Batteries is higher than it actually is.

[vineetaquarius]

@BMSWEB ok , so that will display the voltage higher than it is actual, wonder what is the benefit of that ??i will heck the website.

[muffdriver69]

Dude, how did you manage to get the solder to stick so easily? I sanded the surface and it still doesn't stick, but falls off. :(

And what did you mean by "running a little bit of wet and dry"? I don't understand that.

[BMSWEB]

@muffdriver69 Wet And Dry is sand paper, a rather smooth one. It will remove dirt grit etc from the surface.

[muffdriver69]

@BMSWEB Thanks. Yeah, it still didn't work. I'm probably using the wrong solder ratio. 40/60 right? Should I apply flux also to it? What about using a rosin core solder? All I'm getting is balled up solder. lol. It just doesn't stick :(

[muffdriver69]

@BMSWEB I used a stanely knife to scrape the surface off. Now it sticks like super glue. And I used rosin core solder, it's great now! Thanks :)

Also, I updated my T9X to ER9x firmware, which allowed me to lower the voltage warning threshold for 2 cell, so I didn't need to add that 8k2 resistor . It's all good now :)

P.S: Battery didn't blow up in my face when soldering. All good!

[BMSWEB]

@muffdriver69 Battery not blowing up is always good lol

[DbIMKAzx]

2 Weird things with this mod here.

First pair of these batteries - I accidentally exchanged + and - from the batteries to the transmitter, but the damn box worked (with a switched polarity!), then it started to randomly go on and off... I found out about the polarity issue too late - one battery went dead.

I purchased a second pair, soldered them correctly now. All works in the air, but when I'm flying the sim, the signal from the TX goes on and off. Why?

Also, the max charge pack allows is 7.8V

[DbIMKAzx]

@DbIMKAzx Also, the first pair of these batteries gave me intermittent disconnects from the simulator as well. But when I use 8 regular AA batteries, no disconnects ever happen. It seems, the transmitter doesn't like low voltage when in simulator mode. Does anybody see similar behavior with this mod? By the way, I just cut off one leg of the beeper as I didn't need one...

Question - why can't I charge over 7.8V? Could it be I've burned the battery protection board on one of them? Thanks!

[BMSWEB]

@DbIMKAzx Have you don the trainer mod also? Its in one of my other videos

[philbx1]

Thanks much for doing this video.

Just thought I'd mention that Ebay have 18650 battery holders in various configurations.

[gtidonavan]

@philbx1 Has anybody tried these holder? Do they fit the battery compartment and are the connections secure?

[philbx1]

@gtidonavan

1. I Don't yet know of anyone trying these holders.

2. I Don't know as I don't have an RC unit.

3. Maybe. But as with all connectors, it's up to yourself and not a 'battery connection investigation team' I guess...

[waiuku100]

You should never solder these types of batterys, you risk frying the board on the (-) pole, and the vent hole on the (+) pole will get blocked off.Use only the types with the tag that has been welded on and solder to the tag.

[BMSWEB]

@waiuku100 Yes there is a risk of frying the board

[mavridiskostas13]

*You don't want the soldering tip for more than 1-2 seconds or you will destroy the board....Finally i want to thanks again BMSWEB for this great guide!!!!!

P.S. At what (screen voltage) does your transmitter beep for low oltage after this mod?

[BMSWEB]

@mavridiskostas13 The voltage warning still comes on at the same voltage . . I think its at 8.3 or something like that. Having said that, the resistor tricks the TX into thinking the voltage is higher than it actually is. So the warning will work.

[muffdriver69]

@BMSWEB But any performance downgrades of using the 2s instead of 3s since it is below the recommended voltage intake? i.e, less power transmission output?

[BMSWEB]

@muffdriver69 No performance issues at all, You really need to read the article on the RCReviews website

[mavridiskostas13]

I finally did the mod and looks great....(I currently use 2s lipo 800 mah because my li-ion batteries haven't arrived...)The mod made with ease thanks to your video BMSWEB....The soldering part was really difficult because all the parts was SOOO tiny.....I soldered with a weller 12w soldering pencil....What i have to say id DON'T TRY THIS MOD UNLESS YOU HAVE GOOD SOLDERING SKILLS AND A GOOD SOLDERING IRON OF MAXIMUM 25 WATTS AND A THIN SOLDERING TIP......And you have to apply the solder fast...

[BMSWEB]

@mavridiskostas13 Well Done

[chiliidawg1]

What kind of birds do you have ?

Great videos!

Thanks

[BMSWEB]

@chiliidawg1 They are Green Cheek Conures :)

[BMSWEB]

@BMSWEB and one Cockatiel

[muffdriver69]

@BMSWEB Is this battery rechargeable? If not, why didn't you get the rechargeable ones? Thanks!

[BMSWEB]

@muffdriver69 Yes, if you look towards the end of the video I show you how I charge mine. I only charge my Radios once every few months.

[muffdriver69]

@BMSWEB Oh ok. Thanks. I was a bit confused because I saw same battery but it said rechargeable on the battery, but this one doesn't say rechargeable, so I was confused.

[BMSWEB]

@muffdriver69 If you purchase them from the link, these batteries are re-chargable. Have a look at my charging video for these

[mavridiskostas13]

Great video but just one question..Why did you have to use a resistor?

[BMSWEB]

@mavridiskostas13 If you used 8AA batteries in the Turnigy it would register 12V, if you use 2 Li-Ion batteries like this then you have a voltage of 7.6. So if you don't do the Resistor part as soon as you put your radio on, the battery warning would be sounding continuously. Have a look at the link in the description.

[mavridiskostas13]

@BMSWEB Hmmm ....ok i got it!Thamks a lot!

[BMSWEB]

@mavridiskostas13 its a great modification because the battery doesn't go flat if you don't use the RC for a few weeks . . or months and whats more, is it holds fantastic charge. Best mod i've done so far

[mavridiskostas13]

@BMSWEB Good to know..I just ordered the battery from dealxtreme an 8.2k ohm resistors from ebay..I will just wait for them to arrive and start modding!

[muffdriver69]

@BMSWEB Why not just add one more to make it 3 Li-Ion so that it doesn't beep and you don't have to add the resistor (other than the possibility that it won't fit in the compartment)?

[alisadr77]

What charger do you recommend for this? What charger accepts that servo plug?

Thanks

[BMSWEB]

@alisadr77Make sure you're subscribed as I will be doing another video on charging it etc since I've been getting lots of messages and requests about this.

[alisadr77]

@BMSWEB I will do it right now, just need a brand or something that I can work with at this stage until the video is out. Thanks again.

[BMSWEB]

@alisadr77 I'm using a Turnigy Accucell 6, I'm actually uploading a video now.

[BMSWEB]

@alisadr77 The charging video is up :-)

[alisadr77]

@BMSWEB Amazing, Thanks buddy, you are the one ;)

[MTM80002]

OK I'm convinced , Ive ordered the batteries , i had to order them thrue ebay because the prices here in Sweden is just ridicules as always :(

thx guys

[BMSWEB]

@MTM80002 there is a link to the actual batteries suppler in the description. The reason I purchased these ones is there are plenty of low standard batteries on the market. The ones in the description also come with free postage

[MTM80002]

thanks for the answer , its just that i got a lipo that i have no use for and i thought i could use it for my 9x ,

cheers Mattias

[BMSWEB]

@MTM80002 I know what you mean, I was in the same boat, but trust me if you do this mod you won't look back and won't have to worry about accidentally leaving your RC on and the batteries going completely flat. After 4 weeks of using my TX every weekend plus some week days, I checked the charge on these batteries and they are still showing over 4Volts. Heaps of juice in them

[MTM80002]

Hi there nice video ! , could i use a 2s lipo 2800mAh in this tx ? and just solder the transistor in place ?

[BMSWEB]

@MTM80002 I wouldn't because the advantage in these Batteries is they have protection against over discharging and over charging. Have a look at the written tutorial for this mod in the description. In answer to your question yes you could use 2s Pack but I wouldn't. On a side note I've flown most every weekend and also a number of times during the week and i haven't charged my TX for more than 3 weeks!

[CrazyCases]

Good video. I would be a bit nervous doing the solder part on the main board. But it seems like a good mod. What sort of charge time are you getting on those batteries?

[BMSWEB]

@CrazyCases I've been using it for two weeks now without charging it and I've had multiple flights. When I first charged it I ran it until I got the Battery warning which took about 9 hours. More importantly if I don't use my transmitter for a couple of months worse case scenario, it wont lose charge.

[frankgatt]

cool, you make it look so easy

[JollySwagman2006]

Great video Paul , nice soldering work on the battery pack

[BMSWEB]

@JollySwagman2006 Thank :) I did the first Balance Charge this morning and the TX has been running since 9:00am this morning, its 3 now and still working