I tend to use the GNB Yellow Li-HV Long lipos. The one with the 90C discharge rate. I tend to fly them to 3.2-3.3V, iwth an aim for a resting voltage of roughly 3.5V. But I know Nick Burns doesn’t rate those stubby ones, he mentions the Emax branded 1S (in a few videos) which is basically that Lipo you have. Says it gives on average a full minute less flight time than the Yellow long ones. So maybe the build quality sucks on those.
It should still work. v2.0 is compatible with ELRS v2.0 - 2.5.1 since the major version is 2.0.
It won’t work with v3.x, but nothing says you have to run v3.x, unless you have some specific need for a feature.
I would keep the Literadio for your old whoops and use the TX12 for newer stuff. On mine I run 2.4 or 2.5 on the Jumper and will likely not change it anytime soon, since it works.
Thx for the tips… I’m pondering the options, and the most cost effective one.
I’m happy with the meteor as is, and tbh the crux as well. But I wanted a 2s for flying outside only, no ducts. I thought I could change just the fc on the crux, but their motor are rated for 1s only (1202.5 11000kv). I think that is the case for 3" prop, bc there are similar motors being used on 2s with smaller props, but I can’t find a definitive answer as to which prop I would need to use and if this motor will actually handle it.
The C2 or even the meteor85 could be alternative options to be used as the guts of what I’m thinking of building. But one of the reasons I haven’t committed yet is basically budget. Going for 2s means a new set of batteries and a new battery charger, and all of a sudden the cost just doubles… I’m not working at the moment so I have to keep my feet on the ground and be very conscious of my spending.
Hopefully this situation wont last long and them I can afford to splurge a bit more into the hobby…
Wow, that doesn’t sound right at all. You shouldn’t be getting much from that pack, given its size, but I would think at least around 3min mark. Is that happening with just this one pack?
I like using the 660mah on my crux the best. Wouldn’t go bellow 450 though as the weight and efficiency would probably not match really well for my flying. I would expect the nanohawk to have similar results to mine. Do you fly with other battery sizes as well or just the 350?
You are right - it should still work. I’ve seen many posts about making ELRS V2 work with ELRS SPI… and yet it doesn’t.
It could be the drone. Maybe the RX is faulty. As it’s never flown, it’s possible.
It could be the TX which is faulty - I’ve never actually used it to fly anything other than sims before.
It could be me being a moron. I’ve done stupid things before and overlooked the most basic of things because of assumptions, and I’ll do it again many times more.
The most aggravating thing is the lack of information. No telemetry or logs or anything to tell me what is going on.
I just checked the commit log that was done to make ELRS V2 to work on the Literadio. Looking at the code just looked like “what is the hackiest way to get this to work?”. Take the telemetry handling - commented out. 
When I get the TX12, I’ll try again. Maybe everything will just work, maybe it won’t. Either way, you’ll hear about it!
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You missed it back at Christmas. I got 6x 450mAh 2S lipos from CNHL for £18 and I picked up in total 18 Lipos. I already had a decent selection of GNB Lipos for the Meteor 85 (mostly 380mAh and 660mAh), but now have enough for a year or two, hopefully.
But if not working Lipos probably aren’t high on your list. When they are, try and keep an eye on CNHL for their warehouse clearance sales and you can pick up deals like the 6x 2S lipos for £18-20, you can also sign up an account and do something like log in to Instagram and they give you some of their loyalty points which would give you an extra 10% off, which gives you the same level of discount. I’m saving that for a rainy day, when i might need to do another bulk order of Lipos.
Battery charger wise, SkyRC e3 is about £13 and charges 2S and 3S but only to 4.2v, not HV. I have two of them. I now have a B6 as well, that does everything and can be run from a car of van if out and about, but the e3 is sweet for just charging a couple of packs up the night before I go out.
Those 1202.5 11000kv might run on 2S. I have a set of RCinPower 1202.5 11000kv motors and according to the datasheet they will fly on 2S, but might get warm depending on the props used.
If you did decide to experiment, my suggestion would be to cap the motor output to maybe 60-70% and then fly it and see how hot they are getting. Then increase until you find a level that you are happy with. The numbers are very similar for 1S, so they might still scale up to 2S as is with some output limits.
@Earwig, what voltage are you treating as empty?
Things are a little different with 1S. I suspect you already know this, but I thought it worth asking.
On my Meteor85 with ELRS SPI, I ended up putting in an EP1 as I wanted to put my TX on v3 to allow easier sharing models with my kids. I use the full resolution on my fixed wing models and didn’t want to have to faff around changing to different resolutions when I wanted to fly whoops.
Other than that, v3 is definitely the future and for my use it was worth flashing all my gear to v3.
Do you know that chosing a different rx number in opentx model setup means a different set of settings in the expresslrs module are chosen. So can have models with different resolution settings on the same radio?
I did not know that this was per model rather than global, but then I only ever use model 0. Good to know 
Nice to know about the battery sales… Will keep an eye out from now on for sure…
Regarding the motors… This one was actually one that I had seen before of similar specs which works with 2s as well, and as per the table I would need to go down to a 2.5" biblade to cope with the additional power… The funny thing is that on HM site, the table for their motor doesn’t show that option. It most likely is a marketing thing to promote more sales, but you never know…
I might give this a go… Picking up the 12a fc, batteries, charger and props and transforming my crux to 2s…Heck if this works I might even convert a couple of 1s pairs into 2s… 
Even after getting on for 2 years it’s not really safe to assume I know what I’m doing. 
Even after getting on for 2 years it’s not really safe to assume I know what I’m doing.
Was just checking on the updates of EdgeTX and on the latest it states that your radio is supported. Could this perhaps be a path for you to get your radio on a higher version of elrs? (I havent checked beyond that its supported now by edgetx)
Sorry, just realized this would be for the Pro version, from what you wrote yours seems to be the normal version…
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Yeah i have two sets of 1202.5 at the minute, The C2 Flea comes with the 8000kv variant and the RCinPower I wanted higher kv so went for the 11500kv. My only complaint about them is they are seriously loud. But they generate a massive amount of thrust for the size of build we use them on. I think 700-800g of thrust for a quad that weighs around 100g is pretty sweet. I don’t know what the golden ratio for thrust is, but I tend to aim for 4-5x the weight of the craft as a go to rule in calculations. These motors easily give that.
The main problem i see is find an FC that will do 1-2S. From looking through things, only a handful do 1-2S or 1-3S (in a 25x25 size), with the vast majority doing 2-4S. No use if your aim is to only fly 1-2S. Still you have time to try and find something. At the minute i tend to use the BetaFPV 12A exclusively, mostly because it’s available and good price wise. Since most of mine are SPI ELRS, I can also leave the Jumper at ELRS 2 for now. I have no need of any of the newer features.
I guess the loudness depend on the prop being used as well. With the 3018 biblade mine is super silent.
Happymodel has a 1-2s board as well (FC/ESC/VTX), in fact it would be the one I would buy (its the same one used for the mobula7 as well), they go for about 60 notes. Basically its a 12a version of the board I have…
Regarding elrs 3, I know HM already has support for it on their older spi boards. I havent seen any for BF apart from quicksilver, could be wrong as I havent checked betaflight 4.4 yet, and there is nothing mentioning it on their website. Their new boards seem to be all serial based, so they are all compatible already.
BF 4.4 supports ELRS 3 and will have targets for all the different boards as usual.
Quicksilver 0.9.5 supports ELRS 3 and though it has fewer targets listed it is usually possible to find one that works. Sometimes you need to go on discord and ask.
Ohh, didn’t realize that. Might be time for some upgrades then…
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£60 for a 12A FC is like way too much. You can get a 50A stack for a tenner more. Maybe i’m just a skinflint. £30-40 is my limit, maybe £45 for the 12A HM 2-4S. But £60, never going to happen. You can buy 4 20A ESC’s and an F4 Velox board for that. 