The transmission range will only alter if the RF output stage is running from the full input voltage. Not if is (as is most likely) running off the general 3.3v rail. (To maintain a constant limited output power as required by some Government agencies.) Adding a fully charged 2 cell battery will be much more likely to blow the internal step-down regulator - several folks have reported it. It seems that some regulators really are working at the limit of their capacity with 4xAA cells.

Depending on the chemistry, AA batteries (or D, C, or AAA, for that matter) don't actually produce 1.5V. It's approximate. A brand new alkaline battery actually makes ~1.55V, but it rapidly falls to ~1.25V and stays there for 80% of the actual battery life. If you use NiMH or NiCd AA rechargeable batteries, they *start* their life at 1.25 and fall to about 1.2V for most of their battery life. So 4xAA makes anywhere from 6.2 - 5V brand new and closer to 5 - 4.8V for the bulk of their usage. Almost any device with a microcontroller will have at least one voltage regulator that converts whatever it is getting from the battery into 5V or 3.3V (this radio uses both) for the system to function reliably. So no, monkeying around with the voltage within the nominal range of AA batteries is not going to hurt it. I don't know what voltage regulator it uses, so I don't know the upper limit for it, but it's very likely that it can handle power from a 2S (8.4 - 7V) Lipo or maybe even a 3S. There are regulators that can accept much more but that's not likely here - there would be no reason for them to spend the money on an unnecessarily versatile part. I absolutely am not recommending that anyone try 2S or more, but most voltage regulators have a reasonably wide range of input voltages that they can accept.

Thanks so much! Glad to have you!👍

@@RCwithAdam1 Brother, can we connect the usb wire to laptop for power the transmitter which is connected with transmitter in this video

nice channel too, i like it subbed

Not sure about the max. 5v is safe. It usually takes 4×1.5v aa batteries, so maybe 6v is max.

Brother, can we connect the usb wire to laptop for power the transmitter which is connected with transmitter in this video

Good point. I'll keep an eye out for that.

That just happened as I was working with it on the bench. No low batt warning, just off (program that failsafe, kids! ;) ). Granted, the last time I charged the battery was when I filmed this video. When I plugged it in to charge and it turned back on, the voltage was reading ~4.49V. A warning is definitely helpful, but I think I will continue using this and just regularly charge the powerbank waaaaayyyyyyy before it is even close to empty.

Hi! Thank you! Your powerbank should work just fine! 👍higher mah just means it will last longer.

@@RCwithAdam1 thank you... cheers

Hi! No, I have not done a comparison test.

Definitely!

It cuts off. Ive built it and it just cuts off when the battery runs out. Not safe for rc planes or drones without failsafe RTL.

You need a 12v battery , use a 3S battery

Hi! Okay sounds like you have a USB data cable (as opposed to one that is only for charging). No big deal, just don't use those wires. 👍

thanks! it worked!

Lol. That is data- (white) & data+ (green) You are ABSOLUTELY ok to just cut them off. Be careful!!!!! Nearly all USB power banks today have a sleep mode build in. Why does this mean for me....? Bad things! Being that the transmitter works on such a low power consumption rate, the power bank quite often will not know that there is a load and default to sleep mode, killing the power to the transmitter which very much could be DISASTEROUS. I know what your thinking. Add a couple of LEDs inline.... No. The power bank chipset is looking for a pwm signal announcing there is still a need for power. To combat this, build a simple 555 timer fading pulse circuit and add inline.

alls built in the charger dock! 2 types resisters

Interesting. I would definitely like to see a plane that runs on a power bank like this. I think the main issue is the low voltage for the weight. But maybe something like a big sailplane with a motor that runs well on lower voltage would work well.

yup ,try use 2020 LIFE batterys for longer flight and less power: sp light craft/glider/wing!

Some things! :D

probly 6.5 volts is max the radio.. 7 v .. be pushing it!

Sure! You could use as large a battery capacity as you like, as long as it's right around 5 volts.

Thank you so much for your reply to me,but this is the power bank 6500mAh or 13000mAh. Can I use this power bank to replace the airplane battery?can you tell me?

I would like to request you to upload a new video that talk about the power bank with airplane but not use the Lipo battery with the airplane, Could you?

Lithium is not a good idea for rc plane as it has high discharge rate and lipo has low discharge rate. Using lithium will shut the motors off in seconds

lol... there are tons of others using this very same method without any problems..

The transmitter only draws about 300-400ma so the battery capacity is fine.... It'll run fine on 5 volts as most if not all semiconductors are designed to run 5 volts as a supply voltage.. I get your logic but it's like starting your car drawing a huge current draw from the battery for the starter. At the same time, with the engine off turning on the radio... Same source two different current draws, the radio won't explode.

Electronics will draw what they need not take what they are given- unless you short circuit the system

This mod should and does work fine. As noted in the user manual, the tx has a low voltage warning at 4.2V at factory settings. AA batteries start higher than 1.5V and slowly drop. So this system is designed to work fine at 5V USB as input. To his point, must know your battery bank and what it’s behavior is as it’s power drops. Shutting off would be BAD.

You have absolutely no idea what you’re talking about. Not one bit of your concerns are true

No.