FlySky FS-GT3B modded for lipo use

[NickRummy]

Not re-inventing the wheel here but thought I'd post this up since I've seen it brought up before. Most people are now familiar with the FlySky FS-GT3B 2.4gz radio. I was getting tired of the radio going through AA's as I'm sure most people are. I modded my 3pk for use with a 3S lipo so I thought I'd see if this radio had room as well.

First I removed the screws that held the two halves of the radio case together. At this time I also found out that the times my son has dropped the radio have took its toll! He must of cracked it right around the bottom of the pistol grip because instead of the whole half coming off, only the bottom came off. This allows the battery holder to come out.



Here you can see where the housing cracked at the bottom of the pistol grip.



Test fit with an older Zippy 1500mah lipo. This pack is pretty thick and surprisingly fit, I'll have to get a measurement but I'd guess most packs 1500mah or smaller should fit not problem.



Quick little solder job, heated up the leads on the AA holder and they came right off, soldering up a deans.



Screwed the half case back on and inserted the lipo and wa-la.

[Stampedevxl]

Sweet! Nice and simple, and the on- board.voltage meter means you wont over discharge thats cool!

[urjustamemory]

Hmm, I might have to try this on my Speky.

[Whiplash]

thanks Nick now Ive got another little project to do, whats the c rating of the battery? does it make a difference anyway?

[got nitro?]

Well i know what im doing when i make a HK order.

[E-savage]

thanks Nick now Ive got another little project to do, whats the c rating of the battery? does it make a difference anyway?

20c and no t wont as the radio dosent have a huge amp draw.

[Whiplash]

thanks E savage, I figgured as much, I supposed this would work on my Traxxas 4 Ch as well

[NickRummy]

thanks E savage, I figgured as much, I supposed this would work on my Traxxas 4 Ch as well

Just about any radio it'll work no problem. I did this on my 3PK for a few years and this battery I have in the GT3B is the one from the 3PK.

You could get away with a 5C or 10C pack no problem.

[Kevin Van]

Just note, thou shall not try to use the onboard power jack to recharge.

[NickRummy]

Just note, thou shall not try to use the onboard power jack to recharge.

Good point Kevin

[got nitro?]

Also i wouldnt suggest using it in you trx radio, since there is no onboard voltmeter you stand a much bigger chance of over discharging and you know what happens there.

[lilbrett]

Could you mount something like this to monitor your voltage, and use it in a Traxxas radio?

http://www3.towerhobbies.com/cgi-bin...&I=LXAPBR&P=FR

[Kevin Van]

You could do this, and i'd leave the buzzer off...

http://www.aaroncake.net/circuits/lowvolt.asp

[Stampedevxl]

these already have a voltage meter on the main menu, that still works right?

[Whiplash]

I was thinking about a small LVA in the TRX just to be on the safe side...I like my lipos to charge again.....

[NickRummy]

these already have a voltage meter on the main menu, that still works right?

Yup, I'll let it drop to nominal voltage or slightly below and charge it up. Takes a WHILE to even drop the pack that much. I do want to measure the voltage of my pack to see how accurate the voltage monitor on the radio is though.

[Will10431]

Did you by chance get measurements of the battery?

[crisrc]

pretty nifty guys. oh the things they come up with on this site. i love it here.

[NickRummy]

Did you by chance get measurements of the battery?

I have it in my truck. I'll snag some measurements when I go out there on lunch.

[scottgir]

I did something similar. I found a 3S 1600 20C Lipo that is even smaller than that. I'll post pictures tonight. All I had to do was take the AA part out.