Should i use lipo in devo 10?

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03 Jun 2013 07:40 #10517 by 8987846
Should i use lipo in devo 10? was created by 8987846
I have some 3s 2200mah 20C lipos, but now i am using eneloop AA because i heard lots of people burned their radio with lipo.
the devo 10 is really a nice radio but the only thing i want to complain is the weight. i use 8 eneloop 2000mah AA,it is so heavy! 903 g. almost 1kg!

Should i use lipo in devo 10? or something else?

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03 Jun 2013 12:26 #10520 by syphear
Replied by syphear on topic Should i use lipo in devo 10?
You should be OK to use a 3s lipo in the Devo10 as it normally runs on 12v.

Devo8 radios only use 4 AA battery's in their standard configuration and people run into problems when connecting a 3s lipo to them.

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01 Jun 2016 16:12 #49762 by sledgehammer1570
Replied by sledgehammer1570 on topic Should i use lipo in devo 10?
I just bought a used devo 10 with brand new unused turnigy 3S 2500mAh 5c lipo. I'm concerned if I fully charge it to 12.6V, will it burn my devo 10?

See this link: Burnt component

I've already used it at storage voltage (~11.5V) with no problems. But i don't dare to charge it over 12V.

Anyone used a fully charged 3S lipo with devo 10 without smoke?

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01 Jun 2016 17:50 - 01 Jun 2016 17:51 #49767 by PhracturedBlue
Replied by PhracturedBlue on topic Should i use lipo in devo 10?
Anything over 12V is marginal. You may have luck where others fail or vice-versa. So I wouldn't count on someone else's experience in this regards. The FET in question is only rated at 12V (and that is pushing it to its limits). You will also waste a lot of power in the LDO. I recommend using a 2-cell battery personally
Last edit: 01 Jun 2016 17:51 by PhracturedBlue.

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01 Jun 2016 19:18 - 01 Jun 2016 19:21 #49774 by Flightless Bird
Replied by Flightless Bird on topic Should i use lipo in devo 10?
I use a GensAce 1800mAH 3S LiPo pack in my Devo-10 (it fits perfectly).
However, I have never fully charged it... I pull it off the charger at 12V or 12.1V. If it charges over that and I miss the cutoff, I drain it a bit in a quad then charge up again to 12V.

I do not know if it is safe to fully charge it then use it in the Devo-10, and I like my Devo-10 too much to try and find out by experimentation whether or not the fully charged voltage would be OK or not! :)
Last edit: 01 Jun 2016 19:21 by Flightless Bird.

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01 Jun 2016 19:31 - 01 Jun 2016 20:21 #49776 by PhracturedBlue
Replied by PhracturedBlue on topic Should i use lipo in devo 10?
Why do people insist on using 3S cells? It has no benefit over a 2S cell other than generating a lot more heat (so I guess it may make sense in Siberia or Alaska). with Lipo batteries, you don't really get any more longevity from a 3S vs a 2S battery (on a Devo Tx). These Tx have an LDO so anything over 3.3V is wasted as heat. the safe voltage drop of a LiPo happens way before brownout, and current draw is irrelevant to battery voltage in this case. So why risk your Tx?
Last edit: 01 Jun 2016 20:21 by PhracturedBlue.

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01 Jun 2016 19:56 - 01 Jun 2016 19:57 #49777 by billmester
Replied by billmester on topic Should i use lipo in devo 10?
wow.
Now I know.
I was not aware of the details PB described, I thought having at least the same nominal voltage of the 8 cell NiMH given is a must...
I am using my D10 with 3S 2200 /8C since 2+ years and hundreds of flights.... always fully charged to 12,6V before flying...
Why have I read this post? I was free from worrying, up till now :)
Last edit: 01 Jun 2016 19:57 by billmester.

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01 Jun 2016 20:43 #49779 by Josh69
Replied by Josh69 on topic Should i use lipo in devo 10?
I just have to ask, so the best option is to use 2s lipo on Devo 10? Right now i use eight AA NIMH. But I do have some 2s lipo 1200mAh 30C and they are safe to use in Devo 10? :)

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01 Jun 2016 20:47 - 01 Jun 2016 20:50 #49780 by Flightless Bird
Replied by Flightless Bird on topic Should i use lipo in devo 10?

PhracturedBlue wrote: Why do people insist on using 3S cells? It has no benefit over a 2S cell other than generating a lot more heat (so I guess it may make sense in Siberia or Alaska). with Lipo batteries, you don't really get any more longevity from a 3S vs a 2S battery (on a Devo Tx). These Tx have an LDO so anything over 3.3V is wasted as heat. the safe voltage drop of a LiPo happens way before brownout, and current draw is irrelevant to battery voltage in this case. So why risk your Tx?


I chose the 3S pack I use (GensAce 1800mAH) because I already had several, and they fit perfectly (like they were made for the Devo-10 battery compartment!).

I am NOT willing to risk my radio, which is why I never charge the battery above 12.1V.

If I was doing this "from scratch" and looking for a pack for my Devo-10 though, I'd definitely go with a 2S pack.
Last edit: 01 Jun 2016 20:50 by Flightless Bird.

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01 Jun 2016 20:51 - 01 Jun 2016 20:54 #49781 by Fer
Replied by Fer on topic Should i use lipo in devo 10?
My first DEVO 10, died just as i turned it on, after minor upgrade. Nothing can explain what exactly went wrong, but a guy who specializes in damaged txs told me it was the 3S Lipo that burned it. He said i should have used a 12v Bec. I am now using only rechargable eneloop batteries. More trouble than Lipo, but safer.

Question: Will the tx still be able to save if using a only 2 cell Lipo battery? The voltage will be enough for operating the tx, but i think there is a problem with saving settings. Is there????
Last edit: 01 Jun 2016 20:54 by Fer.

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01 Jun 2016 20:59 - 01 Jun 2016 20:59 #49782 by PhracturedBlue
Replied by PhracturedBlue on topic Should i use lipo in devo 10?
the Devo10 really doesn't need any more than ~5V to run. If you use Alkaline or NiMH, it is a bit better since you can drain them way down and live with a large voltage drop without damaging the batteries, and so they do provide additional longevity (though it would be better with 2 4-packs in parallel. LiPo batteries don't do well being over-discharged though, so it doesn't make any sense to use a 3S to me.
I use both 2S and Eneloop in my Devo transmitters, and don't really have a preference for one vs the other. I will note (for the nth time) that the Devo power circuit is not very robust, and I have seen it burn out on several radios, even those running standard AA batteries (like my Devo8). I'm not quite sure why, but I think I flaky power switch can trigger the power FET to blow. Anyhow, you can make your own choices, but I woul recommend to either stick with NiMH, or use a 2S lipo.
Last edit: 01 Jun 2016 20:59 by PhracturedBlue.

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02 Jun 2016 05:52 - 02 Jun 2016 06:18 #49805 by ThomasC
Replied by ThomasC on topic Should i use lipo in devo 10?
From my own experience I can recommend LiFe. I have this pack in the Devo10: www.hobbyking.com/hobbyking/store/__1795...ansmitter_pack_.html

Fully charged maxes out at 10,5V (and drops below 10V really fast, operating voltage most time is between 9,8V and 9,4V), has a really low self discharge rate, can be discharged completely without damage, has a long run time, no contact problems, cheap, has a separate charging connector so no need to unplug from the Devo (can safely be charged inside). See www.deviationtx.com/forum/6-general-disc...ry-suggestions#36234

p.s. warning levels I have set for this pack: 9,3V warn (9,2V is safe, too), critical 8,7V (tx.ini has to be edited by hand), but is really hard to discharge, run time has shown to be wide above 10 hours (haven't measured exactly, as it is not my own Devo10). Big big difference even compared to eneloops.

---
Last edit: 02 Jun 2016 06:18 by ThomasC.

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02 Jun 2016 06:51 - 02 Jun 2016 06:52 #49809 by billmester
Replied by billmester on topic Should i use lipo in devo 10?
This LiFepo looks cool. I'll try to get one.
I am using this now: www.banggood.com/STARC-11_1V-8C-2200mAh-...mitter-p-987461.html
Before, I was using this: www.banggood.com/ZOP-Power-11_1V-2200MAH...mitter-p-964544.html
but after 1,5 years one cell got shorted internally and became puffed and I took it apart. Do not buy that.
I'll try to assemble the remaining 2 good cells into a new pack for the D10.
...but I am fully satisfied with the current lipo and very happy with its capacity. Probably, I was lucky ang got a good quality electric panel in my D10 :)
Last edit: 02 Jun 2016 06:52 by billmester.

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02 Jun 2016 12:06 #49818 by sledgehammer1570
Replied by sledgehammer1570 on topic Should i use lipo in devo 10?

PhracturedBlue wrote: the Devo10 really doesn't need any more than ~5V to run.

Dumb question here! What if i use a 5V bec with the 3s lipo? How would that work for me? At least it's cheaper than buying a new battery :lol: Also I don't have any other use for this 5c lipo.. You can get a 5V bec for under 3$

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02 Jun 2016 12:14 #49819 by PhracturedBlue
Replied by PhracturedBlue on topic Should i use lipo in devo 10?

sledgehammer1570 wrote:

PhracturedBlue wrote: the Devo10 really doesn't need any more than ~5V to run.

Dumb question here! What if i use a 5V bec with the 3s lipo? How would that work for me? At least it's cheaper than buying a new battery :lol: Also I don't have any other use for this 5c lipo.. You can get a 5V bec for under 3$

That is probably really dangerous. I don't know much about current BEC circuits, but I think you'll lose all ability to monitor battery voltage, and will likely over-discharge your battery. Also just FYI, I haven't recently checked the minimum allowed battery level on the devo10. I recall it to be below 5V, but it may be closer to 6V. I'd recommend testing it rather than taking my word for it.

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02 Jun 2016 14:55 #49820 by sledgehammer1570
Replied by sledgehammer1570 on topic Should i use lipo in devo 10?

PhracturedBlue wrote: That is probably really dangerous. I don't know much about current BEC circuits, but I think you'll lose all ability to monitor battery voltage, and will likely over-discharge your battery. Also just FYI, I haven't recently checked the minimum allowed battery level on the devo10. I recall it to be below 5V, but it may be closer to 6V. I'd recommend testing it rather than taking my word for it.

About battery monitoring.. I noticed when i hook up my 12V lipo to the devo, the monitor seems to drift around 11.65V - 11.7V. At the same time i measure the voltage from battery, with multimeter, while devo is on, it displays 11.99V. Is the monitor somehow exceeded it's limit? But yeah, your'e right about losing the ability to monitor the voltage, with the bec.

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02 Jun 2016 15:53 #49825 by mwm
Replied by mwm on topic Should i use lipo in devo 10?

ThomasC wrote: From my own experience I can recommend LiFe. I have this pack in the Devo10: www.hobbyking.com/hobbyking/store/__1795...ansmitter_pack_.html

Fully charged maxes out at 10,5V (and drops below 10V really fast, operating voltage most time is between 9,8V and 9,4V), has a really low self discharge rate, can be discharged completely without damage, has a long run time, no contact problems, cheap, has a separate charging connector so no need to unplug from the Devo (can safely be charged inside). See www.deviationtx.com/forum/6-general-disc...ry-suggestions#36234


That's normal behavior for LIFe packs. They drop to working voltage quickly, then stay there quite a while with great storage capabilities. I prefer them for Rx packs. I use NiMH LSD packs in my Devo so I can use the built-in charger, but if it didn't have that I'd probably use LiFe packs.

Do not ask me questions via PM. Ask in the forums, where I'll answer if I can.

My remotely piloted vehicle ("drone") is a yacht.

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02 Jun 2016 16:00 #49826 by PhracturedBlue
Replied by PhracturedBlue on topic Should i use lipo in devo 10?

sledgehammer1570 wrote:

PhracturedBlue wrote: That is probably really dangerous. I don't know much about current BEC circuits, but I think you'll lose all ability to monitor battery voltage, and will likely over-discharge your battery. Also just FYI, I haven't recently checked the minimum allowed battery level on the devo10. I recall it to be below 5V, but it may be closer to 6V. I'd recommend testing it rather than taking my word for it.

About battery monitoring.. I noticed when i hook up my 12V lipo to the devo, the monitor seems to drift around 11.65V - 11.7V. At the same time i measure the voltage from battery, with multimeter, while devo is on, it displays 11.99V. Is the monitor somehow exceeded it's limit? But yeah, your'e right about losing the ability to monitor the voltage, with the bec.

The battery voltage is calibrated based on the transmitters I personally own over a given voltage range. Different transmitters may not have identical calibration. This is not something that is currently tunable by the user, though maybe I'll change that some day. To properly calibrate you need 2 points far apart (for instance 12V and 5V) and the ability to precisely hold and measure these voltages. with the transmitter on. That is beyond the means of most users. The values measured are not perfectly linear either, so without a much more complex algorithm, we will never see perfect accuracy.

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12 Jun 2016 00:17 #50442 by C0ckpitvue 777
Replied by C0ckpitvue 777 on topic Should i use lipo in devo 10?
Is it safe to put a 11.v 2200 mah battery in the Devo 10 w/out a regulator?Will it destroy any thing internally?Any fb is greatly appreciated,God bless.

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12 Jun 2016 08:02 #50456 by HappyHarry
Replied by HappyHarry on topic Should i use lipo in devo 10?
read the previous posts to your own, it's covered there

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