FlySky FS-GT3B 3s LiPo Battery Mod

G'day! In this video I modify a FlySky FS-GT3B Transmitter to use a 3s LiPo battery in place of the 8 AA batteries for convenience and hopefully longer run time. There are many videos out there on the subject, but this is my take on the mod and I try to make it as quick as possible. Hope you find it helpful.
The battery I'm using is a Turnigy Nano-Tech 3s 11.1v 2500mah.
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[@GrumpyOldManRC]

Very informative. I did a similar mod on my Tower Hobbies branded Kraft RC plane radio back in the '70s. Put plugs on both the RX & TX so I could charge them while still in the plane or transmitter. Of course we only had NiCads but that was still better that the regular alkaline batteries. Thanks for sharing!😎👍

[@RCHobbyShed]

Thanks mate. Oh yeah, back then it was a huge leap going from alkaline's to NiCd's, your mod would have made a huge difference to run time and you wouldn't need to go to the shop and buy batteries every time you want to fly. RC life is so much easier these days, with things like Electronic speed controllers, brushless motors and LiPo batteries! Thanks for watching! 🙂👍

[@GrumpyOldManRC]

Always!

[@gonzodetroitify]

Omg😱🧐 will this work in theory even for most transmitters out there what a score💯💯

[@RCHobbyShed]

For sure! 🙂👍

[@Leonsrchobbys]

Fantastic video my friend I have two of these controls great little mod I will be doing this👍😎🇬🇧😊

[@RCHobbyShed]

Thanks! Way better than all those AA batteries. 🤣

[@satorrotas]

Excellent , great tips and very good tutorial !! Nice work !!

[@RCHobbyShed]

Thanks mate! 👍

[@satorrotas]

@@RCHobbyShed 😊👍

[@ZeroMass]

First thing I did with this remote was to add 3x18650's wired in series.. Only have to charge it once a year lol

[@RCHobbyShed]

Great idea! I have the same with this battery, people keep asking how long a charge will last, I have to answer I have no idea as I've charged it once since doing the mod 🤣

[@ZeroMass]

@@RCHobbyShed lithium batteries are awesome in that regard.. not to mention they can keep their storage charge for a very long time. I've happened across cells I haven't used in a decade or so that are ready to go. I replace all batteries immediately when the originals are nimh or nicad.. those chemistries are far beyond obsolete in my books .

[@Rhoedision]

well enjoyed your upload amazing and 100+likes

[@jonenglish6617]

Thanks Mate. nice and simple, just like me. Cheers

[@RCHobbyShed]

No probs, Jon! Glad it was helpful. 🙂👍

[@Fuck_Tarentum_Boro]

Finally pulled the trigger on a lipo battery to do this. Tired of buying AA batteries every couple outings

[@RCHobbyShed]

Awesome! Oh yeah, those AA batteries become a pain real quick! 😁👍

[@VoidXRC]

Nice mate that is a great mod

[@RCHobbyShed]

Thanks mate. Yeah finding and charging the 8AA's all the time drives me nuts. 🤣

[@ShenRC]

Nice! exactly what I did to mine!

[@RCHobbyShed]

Hows your battery life now compared with the 8AA's?

[@ShenRC]

@@RCHobbyShed Hi seems to be working great..your lipo is larger than the one I used so yours should last real long.

[@RCHobbyShed]

@@ShenRC Awesome, I was hoping for better battery life. 👍

[@petergoodwin2465]

Thanks mate , I bought 2 Gt3c radios. They're a much better radio than the cheapo Spectrum Arrmas have. .

[@RCHobbyShed]

Thanks mate. Yeah I've heard the radios that come with some of the Armmas are pretty ordinary. Hasn't effected me yet as I can't afford an Armma. 🤣🤣

[@petergoodwin2465]

@@RCHobbyShed They're not really Spectrum radios, they have a different protocol and the receivers won't bind to a Spectrum. Horizon should give us the option of buying cars without the radio like the Bnf planes. These fly sky radios are great especially for the price. Went to Metro hobbies and bought spare arms for the 4s outcast , soon as I got home I cartwheeled it and broke the front arm. Couldn't believe it , thanks for the advice on buying these radios mate , they're great.

[@RCHobbyShed]

@@petergoodwin2465 Ahh, shifty f**kers. Yeah it would be great if they came without radios. Can't beat the FlySky's for the price. Haha always the way, it's hard to actually have spares sometimes. You may have to buy in bulk. Cheers mate, anytime! 👍

[@petergoodwin2465]

Its great having spares but good to try some mods as well. Wife has a Senton 6s ,Vas at Metro hobbies said try some proline tyres .They're a little bit bigger rims and tyres , was very impressed with it . Faster and tracks perfect even over rough ground and handling is great. Things very fastbut the 3s Senton is just as fast and i cant break it. Ive flipped end over end at 50 mph ,cartwheeled it into rocks and nothing wrong with it just keeps going. Ordered a new shell , want to try bigger granite wheels and 6s typhon shocks . These rc cars are too much fun, now the wife wants an Arrma Mojave, Saw one at Metro and the things a tank. I better get a box of spares the way i drive ha,ha,

[@RCHobbyShed]

@@petergoodwin2465 Sorry Peter, I didn't see this reply until now. Proline tyres are great, I've used them a lot over the years and they've always been awesome! It's great everything worked out. 👍

[@davidturner2365]

Great mod !

[@RCHobbyShed]

Thanks. Hope it was helpful. 🙂👍

[@davidturner2365]

Yeah it was now all my transmitters with 8 AA’s will get a lipo 👍👍

[@ModModRc]

Iv done all the soldering. A FULL charge for my battery pack, for Radioshack RC6GS & it says says low battery Can u recommend some battery specks for me to find suitable

[@RCHobbyShed]

I think the battery for the RC6GS is only 2s. You need a 3s battery. A battery like the one in the video works, and I think Zippy make one similar. 👍

[@joekesler8014]

great mod ,done a few of them in my day, but have to say, you would look a lot more professional with some decent tools, like some Klein small awg stranded strippers, maybe like 20 -30 awg right tool for the right job.

[@RCHobbyShed]

There's absolutely nothing wrong with using side cutters or even pliers to strip wires if you know what you're doing. In my trade and an Electrical Fitter/ Armature winder we never used wire strippers, most are basically a gimmick.

[@edwardlove4300]

Thanks for the teaching, can I use a 7.4V 1000mah battery?

[@hollyhillrc]

Hello mate. Thanks for this. It's a great easy to follow tutorial. I've just got a 3B with an RC I've bought. Does the GT3B have a low battery alarm like the GT3C, and does it work with a Lipo, or do I have to keep an eye on the voltage. Thanks 😊👍👍

[@RCHobbyShed]

G'day mate and thanks! I don't think the GT3B has a low voltage alarm without having the firmware hack done, which mine hasn't had, but it can be done. I run a LiPo with mine and I just keep an eye on it. Hope this helps. 👍

[@hollyhillrc]

@@RCHobbyShed Thanks for the quick reply ! Yes that's very helpful. Sorry to ask another question, but what's the low voltage limit of the 3s you're using. My maths skills are not up to much 😄😄👍

[@RCHobbyShed]

@@hollyhillrc All good mate, I skipped a lot of school so I'm no good either lol. You want 10.5v which is 3.5v per cell. 👍

[@RCHobbyShed]

@@hollyhillrc P.S. I did the screen mod just now. So I can see what's on the screen when the light times out. Easy as! 😁

[@brenthumphreys5747]

I have the 3B and it cuts at 9 volts.

[@mohammedeldaly5645]

Can i use the 18650 batteries please??

[@LargeeeScaleLife]

If you’re using a Lipo in one of these is it OK to keep it charged or is that bad for the battery after you use your controller do you need to put the battery back in storage mode?

[@RCHobbyShed]

That is a really good point! I actually just leave mine near to full, although that's not really the right thing to do with a LiPo. So yes, you really should do a storage charge after use to be safe, especially if it's not going to be used for a while.

[@LargeeeScaleLife]

RC Hobby Shed that’s what I was thinking I’m honestly on the fence on whether to send my 3BN to be hacked or if I should just buy one of the 3C models

[@RCHobbyShed]

@@LargeeeScaleLife Sorry I didn't see this reply till now. This mod is (or was) great before the 3C came along or for people who can't afford the 3C I guess. If you have the choice, I'd say just go for the 3C. 👍

[@LargeeeScaleLife]

RC Hobby Shed I ended up going with the 3C there’s actually a shop near me that Elfers the hat service pretty cheap just got it back in the mail and received some receivers the other day so now I just need to get it set up but it definitely seems like a solid choice thanks for all the info definitely helps

[@RCHobbyShed]

@@LargeeeScaleLife Nice, the 3C is a great radio. I'm happy I could be of some help. 🙂👍

[@CaveMan-ly5bb]

How long dose one charge last and was the battery strong enough?

[@RCHobbyShed]

In short, a long time! I haven't actually measured or even noticed how long it runs for but it's nothing like the AA batteries that I was forever changing. I can take a car for a run, leave it for days and go again without worrying about the radio battery. The voltage is actually higher than if using NiMh AA batteries, 9.6v for AA's vs 11.1v for 3s LiPo. Alkaline batteries are 1.5v each, so 12v for 8 of them but because of their low mah rating they don't last long. After I did this mod battery life is way better! I yapped on a bit here, but I hope it helps answer your question. 👍

[@CaveMan-ly5bb]

Ok i did the mod but my battery is not strong enough. Do you have a link or what battery should i get?

[@RCHobbyShed]

@@CaveMan-ly5bb This is the one I used. I know Zippy make one too. www.ebay.com.au/itm/Turnigy-nano-tech-2500mAh-3S1P-5-10C-Transmitter-Lipo-Pack-Futaba-6EX-and-3PKS/151415904394?hash=item234117588a:g:aaQAAOSwk1haDoV9&frcectupt=true

[@macdexter7454]

Lipo 2s 7.4v can support this remote ?

[@RCHobbyShed]

Sorry Mac, a 2s isn't enough. The 8 AA batteries add up to 12v, even a 3s is a tad low at 11.1v but it works well. 👍

[@marknickells6097]

A slim line Turnagy (3S ) 2400 fits perfect, YET I also saw a guy run a 3200 PAK in. THE only caveat, is use you can't charge directly through the discharge cables. YOU still have to Balance charge the battery, which means taking them out to charge, (and discharge), every time you use them. A haste. THE C version of this Radio, uses a 1 S , 3.7 volt, low capacity system, and is basically garbage. FLSKY had the right idea, but didn't deliver.

[@reymunoz7891]

What battery is that?

[@ronnyvandenheuvel9049]

hey may i ask which cable to use to charge

[@RCHobbyShed]

On this battery either of the plugs which have two wires can be used for charging. The other plug which has four wires is the balance lead. On my charger I use a Futaba to banana plug lead I made myself, although they can be bought on eBay.... So in short, I use the balance lead always and the Futaba plug. Hope this helps

[@ronnyvandenheuvel9049]

@@RCHobbyShed thanks for your quick reply so i can make a cable from futaba to traxxas because i have a traxxas charger

[@trutzmeinl9449]

Great mod, i just did it too now. But one question, if you do not use your Transmitter do you leave the lipo inside and charged? Or do you put in Storage charge each time?

[@abdulhaniff4860]

That lipo battry, what spec that you use?

[@abdulhaniff4860]

What ????V & ????mAH?

[@RCHobbyShed]

I'm using a Turnigy Nano-Tech 3s 11.1v 2500mah. 👍

[@brettkern7752]

Does the lipo last longer than the AA? Or is it just for the convenience of being able to recharge? Just ordered this radio and may do this right out of the box. Thanks!

[@andreeasum4243]

how did the weight balance feel?

[@RCHobbyShed]

I didn't notice any difference using it. I'm guessing it is a little lighter though.