How to change to lipo in a dx3r

[gaffer]

Hope someone can guide me on this, have seen a few people use small lipo batteries instead of nimh aa's in there transmitters. Can it be done on the spectrum dx3r? If so how easy(im pretty useless) is it to do? and which lipo will fit?

Any help and advice would be awesome.

Cheers

Stuart.

[coolcars782]

I dont think you can use lipos in it because there is no equivalent voltage, this means the voltage will be to high using the Lipos, causing damage to your dx3r
I wanted to do this with my dx3s, but we cant.

[gaffer]

Thanks for the answer, thats a real shame. Oh well nimhs it is then

cheers.

[Ferret]

I converted mine to LiPo.
You need to loosen all the DX3R's screws and then pry the two halves slightly apart. That will allow you to remove the AA battery tray and will leave a huge space for the LiPo of your choice. I cut the two wires that connected the battery tray to the transmitter and soldered a conector that fit my LiPo.

I used a 1s2p pack that I buit from two 1200 ma packs giving me a 2400 ma pack and so far it lasted much longer than my NiMhs.

The transmitter have no problems operating on 1s voltage and the fact that it stops transmitting at 3.5v assures that the cut off foltage of 3V will not be reached without notice.

I read on the net that someone installed a 2s pack with no ill effects to the ransmitter, but I didn't try is myself. I could have connected my two 1200 ma pack in series instead of in parallel, but it wouldn't have changed the total amount of energy in the pack and would have required some sort of low voltage cutoff.

Avner.

[coolcars782]

My bad, just going by what i found on another forum

[BagofSkill]

I imagine you could also use one of the 'step up' or 'step down' voltage regulators available for any BEC circuit to run either a 1 or 2 cell pack for any of the '4xAA' models.

[mark christopher]

just be aware thats its against the brca's general rules to modify a transmitter so it exceeds the manufactures recomended voltage
ie 4 x 1.5 dry cells is 6 volts, so to put a 2s (7.4 volt) pack in there is not going to be acceptable

like wise a 8 cell x 1.5 volt is 12 vilts so a 3 s lipo is 11.1 volt which is ok.
i qoute 1.5volt as the manufactures suggest dry cells like duracell which are 1.5 not 1.2 of rechargables

as bagof skill, says i would think if you used a 6 volt voltage regulater you would be ok, but double check!
please just be warned guys

[gaffer]

Thank you so much for the advice guys, I will stick with nimhs to be safe and sure.


cheers


Stuart

[ghost2212]

Originally Posted by mark christopher

just be aware thats its against the brca's general rules to modify a transmitter so it exceeds the manufactures recomended voltage
ie 4 x 1.5 dry cells is 6 volts, so to put a 2s (7.4 volt) pack in there is not going to be acceptable

like wise a 8 cell x 1.5 volt is 12 vilts so a 3 s lipo is 11.1 volt which is ok.
i qoute 1.5volt as the manufactures suggest dry cells like duracell which are 1.5 not 1.2 of rechargables

as bagof skill, says i would think if you used a 6 volt voltage regulater you would be ok, but double check!
please just be warned guys

Also a 3sLipo fully charged reads 12.6volts

[coolcars782]

Originally Posted by ghost2212

Also a 3sLipo fully charged reads 12.6volts

The nominal voltage is 11.1v which is what we would be looking at

[mark christopher]

Originally Posted by ghost2212

Also a 3sLipo fully charged reads 12.6volts

Originally Posted by coolcars782

The nominal voltage is 11.1v which is what we would be looking at

spot on cool cars, its the nominal voltage.

Ghost i have done my home work on this as the section i run in this came up and we had to get official clarification!

[Marvin]

I've converted my DX3R - I've got a Tornado 3000mAh 7.4V Rx pack through a Novak Rx regulator - 5.8V all the time and lasts forever and a day. Much better .

Don't try and run it without the regulator - the DX3R is designed for 7.2V max.