Proof that BetaFPV BT2.0 is better than PH 2.0 (BEST TINY WHOOP BATTERY CONNECTOR) 

This guys not only got the word of mouth, he’s got the technical research and experimentation to back up his words! Super valuable content, great work

Great test! It would've also been interesting to see those same batteries tested without any connectors as a control for the cells.

This is the test I suggested to Albert Kim a month ago, i.e. Test actual same pack with both connectors, and that was after he commented that brand new cells from same set can vary. really nice to see it done JB, well done, +1 for scientific whooping!

ty! for more tests on these connectors :) super promising innovation for the lil whoops, seems like a great middle ground for those that dont want the xt30 weight too

Hey Joshua! A suggestion to test the performance of both connectors completely independent of the cells connected: Hook up each the connectors between a dummy load and a lab power supply. hook your most sensitive multimeter to measure the voltage drop on one side of the connector (let's pick the ground side of the connector and multiply the result by two, or measure both high and low side). Now set the lab supply to 4V do a series of measurements of the voltage drop at the connector itself at different amps of load so you can actually accurately calculate the resistance of the connector using ohms law. It will also be interesting to see the resistance increase as power dissipation on the connector heats it up. This way you can simply and rather accurately outline the resistance characteristics of each connector. Thinking of it, you might even be able to do the measurement with only the lab supply in constant current mode. Just see how many volts the supply is able to push through the connector at each Amp setting, and multiply the result by two, because the connector actually has two ends. The resistance of the connector would obviously be R = U * I . So for instance if Voltage at 1 Amp was 0.1V the resistance of the connector would be 0.1 Ohms.

Yay for JB demonstrating what I have been telling people all the time. The voltage drop is the key issue here.

I upgraded my 1s build to the BT and it was a fairly obvious improvement on voltage sag in-flight. So I was sold immediately.

Thanks for this video I was going to do this test myself Because I was 99% sure that this would be the outcome thank you for all you do.

Great work! I am now curious to see the same test with gnb27 and xt30 connectors. It would be nice to see also a measure of resistence. thank you for your effort!

I know this is old, but thank you for doing this test the right way. That you came up with this test method furthers my trust in your reviews. It's not often that youtubers are technically capable and not just good salespeople. I'd also add that the BT2.0 connector is more robust from a number of plug cycles. That combined with the lower power loss really makes the case for getting rid of PH2.0 whenever possible.

Thank you, you have sold this to me time to convert all my battery's as racing & PH 2.0 is killing the fun with power dropouts as the pins heat up.

That was actually more interesting than I thought it was going to be.

Nicely done JB!

Great Video! My experience is that the PH2.0 connectors wear out quickly also. Could you test that with both PH2.0 and BT2.0? Measure voltage drop after 25, 50, 100 insertions? I think this might be very compelling.

Exactly what I expected, I was one of the first in Germany who used Mosfets (including brake) and High Amp connectors for Airsofts (long long time ago). I have a resistance (Ohm) Wheatstone bridge which can precisely measure down to less than 0.1 Ohms and my test results showed the large Ohm difference between different connector types. If you combine this with the knowledge of Ohm`s law, it is obvious that connectors have a clear impact on performance. However just using even more bigger connectors, brings up a weight disadvantage at some point (relatively to the quad weight) which kills the Ohm advantage of the better connector. Thanks Joshua for that test!

Thx for your Testing.

Nice job. As an EE, I can say you did it right.

I find even PH2.0 connectors wear out pretty quick. Looking forward to trying the BT connector for my tiny whoops.

We need a XT-10 or XT-15 connector!

Awesome testing, Joshua! Thanks a lot!!! 😃 The only thing is that, unfortunately, there's no BT 2.0 connectors available from Banggood, so... No way for me to buy them yet. 😕

Excellent info. Thanks.

Just gonna leave a comment for the youtube algoritm, keep up the good work

Great analysis!

I put them on my brushed beebrain lite and it for sure had more power and about :30-40 sec more flight time.

Xt30 is where its at for me. I was running the red jst 2 pin connectors and had good results initially on my inductrix. However soon flight times started falling off from 3 to 4 minutes down to 2, 2.5 minutes. Changed the connector with a new red jst and same thing, good flight times and eventually less. I switched to xt30 and its so much better. Consistantly getting 3.5 to 4 plus minute flights. The performance is better too. The battery doesnt sag as bad after takeoff and even has a little better power for recovery. All in all made my inductrix way better!

I love your videos keep it up and I wish I could be one of your patrons but I can barely afford to buy a tinywhoop I want a 5 in but I can’t afford it you deserve to have more supporters also can you review the meteor 65 acro/19500kv

great video Joshua! thanks

Good work, would like to see it in increments of 5, 5, 10,15 and 20A discharge to see more accurate result

Excellent review.

Great test.

I like learning.

I bet the original tinyhawk could benefit from this connector. Gonna be testing that theory as soon as my package from betafpv arrives 👍👍

Would be great to see this emerge as a standard. I think this would shine even more on 1s/2s compatible whoops/toothpick that combine two 1s batteries for 2s.

I knew the performance with the bt2.0 connector was better,but it's great to see scientific proof.thanks Joshua,great job.since the meteor 65 and betafpv batteries i purchased came with the bt2.0 connectors,i couldn't compare them with ph2.0 batteries.so,i switched out the ph2.0 connector on my us65 with upgraded 0703 motors with the bt2.0 connector.the difference was nothing less than amazing.i got loads more power and 30 seconds more run time with the 300mah betafpv bt2.0 battery compared to the 300mah gnb ph2.0 batteries. all the betafpv battery haters out there need to know that the new cells are of a much higher quality than the older ones.i know this because i purchased some new 350mah gnb batteries and swithed the connectors over to bt2.0's and only got about 10 seconds more flight time compared to the 300mah betafpv cells in my us65. the gnb's are 1/2gram heavier,but they should have done better than that,right?i obviosly can't comment on the longevity of the new betafpv batteries,we'll just have to wait and see.

I agree. After testing, i found the bigger the battery, the more obvious the difference. This connector will unlock performance on 1S 450mAh and more. On 300mAh, the advantage is still here, but very small.

Did you test with solid pin connectors? I have been using jst xh for a while now and get better flight time with 260 xh combo over the beta 300 bt2.0 on a the metoer 22000kv motors.

thanks à lot, and what about the new gnb27 ?

Hi Will this work with a blade inductrix and can I use a 3.8v thanks

These will be great on micro helis! 👍

Can you compare the xt30? I suppose is the same result and it might be just heavier

What's your thought on a 2x bt2.0 power connector for 2s using 1s?

would it be wise to swap out the PH2.0 connectors with BT2.0 on whoops etc that use 2 1S cells to achieve 2S? I feel like this would be a great jump up without having to switch over to XT30 2S packs

Well done.

I remember hearing decades ago when nicads were THE battery type for RC cars that some racers would solder their batteries to the car's power input to gain the best amparage possible, this was back when Tamiya connectors were the standard.

Hi.. i was testing this when considering to upgrade my batteries to xt30.. the result was that you have to conseider the wire too. So i dropped the wire on the battery and soldered the xt 30 dirrectly to the cell. This sawed some weight and i gained some power by removing the unnecessary resistance. The xt30 is too heavy for the weight and if there was a connector like bt2 i would have used it. Thanx for an informative video..

Great video! One minor correction though... At 20000Kv, 0.1 volts correspond to 2000rpm, not 200rpm :)

How much to they weigh vs xt-30? For gram pinchers, is it worth stepping down to BT2.0 from xt-30?

Can agree with conclusion about BT2.0. In my Mobula 7 recently changed pigtail and batteries to ones with BT2.0 connectors. in result when flying is same manner as usual got final battery voltage around 3.3-3.4V which is Ok for discharged LiPo battery. When I fly in same manner during same time with batteries having PH2.0 connector, on end battery voltage was 2.7-3.0V which already damage LiPo batteries. Seems new batteries will live longer too thanks to BT2.0 connector.

I would prefer PT3.0 ( so 3pin) so o can use it to connect my motors to esc's

What should I do with the Tinyhawk S since it runs on 1S (PH2.0) and most aftermarket 2S (XT30)?

I've found it difficult to make internal resistance measurements on my batteries with PH 2.0 connectors. If I get a strange value I simply reconnect and test again. Point contact resistance was something I didn't think much about until now. The banana plugs on cheap battery chargers are also another source of point contact resistance that should not be ignored.

Was this done with the specific PH2.0 Solid Pin connectors?

Were those folded pin ph2? Thanks

Joshua is on the track of Ohms Law :D It should not be a surprise that the voltage drop is the same for the same current with whatever cell type ;)

My woop has a ph2 connector and voltage will be at 4.25v and when I take off battery voltage droppes straight down to 2.9v and there’s a huge lack of power no matter what batt I put on it, would this new betta Fpv connector fix my problem??? Ps running 0603 19000kv If anyone knows pls help Thanks Ethan

Did you ever test without connectors for a baseline? I would have loved to see a test with the battery directly soldered to the tester for more of a baseline of what the battery can do, and if a better connector than the BT2.0 could be created.

Great test, thank you that someone finally digs out the crap. But you always run the ph2 first and then the bt 2. But there is a BIG problem with it. Whenever you charge your battery the first two to three time after bying or having them in storage the performance is coceivably weaker, the chemistry has to wake up, you can really feel that if you start to fly whoops in winter on your flight times which go up while speed goes up as well. Why don't you just test the connector resistance and the voltage drop with a lab bench power supply and eliminate the wonky factor (battary).

Just read the datasheets of the JST PH connector. Look at resistance vs. mating cycles. That is the problem that BT2.0 tries to tackle. Mystery solved (wouldn't make a compelling video though). Seriously guys, I wish the RC community was less about hear say. It's all thoroughly characterized. Just look at the data the manufacturer provides after something like a quadzillion of tests. It's all out there. And yes brand new PH2.0 connectors with intact plating (10mOhm per JST), even used out of spec as we do, perform not noticeably worse. So inb4 someone mentions that :P

Hey JB, Have you managed to come up with a good way to storage charge/discharge 1s whoop type batteries? You commented in a video months ago that you were working on it, and I was hoping there's news. Thanks

i'm assuming the tests were with a healthy socket, it gets worse very quickly as the sockets age, a good percentage of those little sockets melt and get worse and worse, did you get any ways to test the jesc thing?, people saying its a big boost in flight time from the rpm filters mod for non 32bit esc's,

Please try a solid pin ph2.0 with 18awg wire. I’ve noticed significant benefits and then I can use the same batteries and charger connectors.

Would be nice to see the graph for a more normal amp pull instead of the extremes of 1C and 44C how about that 2-5 amps you say should be average to upper limit? To see what our performance advantage would be.

Thanks for posting this and testing in your usual thorough manner.Common sense will tell you a bigger hose will flow more water.Do you feel the XT30 becomes a weight penalty?I'm not a racer so it makes little difference to me,but to a whoop racer everything counts.

How do i discharge these things?

Thanks for the video JB! Was the pH 2.0 connector solid or rolled? Maybe you could include super close up detailed pictures of the connector you used for us? The reason this is important is because if you use the rolled connector that would increase the apparent benefits of the BT 2.0 connector. Maybe the solid pin connector that really isn't a big difference? Gotta know/ test for the scientists!

L13 from Edu mate 🤓😁👍, good job as always 💕💕💕

If like to see you test solid pin ph2.0 against these also.

What do you think about bt2.0 On 2s?

Can confirm, bt2.0 2s tinyhawk s flies like a ballistic missile now. RPM filtering further helped.

One easy way to test these connectors would be to just run 5 A current through them and then measure the static voltage drop across the connector. Any voltage measured across the connector is away from the motors and used to heat up the connector. Also worth keeping in mind that any measured voltage drop on the connector is most likely happening on both of the leads, positive and negative, so it needs to be summed up together to get the whole effect. One comment about the battery voltage measurement, if two measurements are performed really closely, the battery will get exhausted and provide worse results on the second run. The "imaginary" internal battery resistance (it's not pure resistance) goes up (at least on Li-ion) when current is pushed or pulled from the battery. Preferably, there should be many hours between the measurements (24h?) to provide comparable results. By measuring the voltage drop across the connector, we don't need to worry about the current state of the battery cell and any load history it has been subjected to recently. Though, just looking the 20A result tells us that the BT2.0 is of much lower resistance connector than the PH2.0.

Just bought some GNB 720 mah 100c batteries for my BetaFpv Cetus Pro and a 5 pack of BT2.0 connectors to get rid of the stock PH2.0 connectors on the batteries because even on new mode on slow speed when I'm flying around my house I only get about 1 minute 42 seconds on a freshly charged battery. Sport mode on mid speed gets about 54 seconds of flight time. I've tested the stock batteries and they show no fault in discharge or capacity shortage, so I'm confused as to why I'm getting such short flight times without pushing the Cetus or its stock BetaFpv batteries. I had to upgrade if I actually wanted to fly it.

anyone tried both xt30 and bt2.0? how's the performance?

BT2.0 makes my UR65 brilliant. Tinywhoop 333 batteries!

Cool comparison! Great job. By the way one of the worst problem of ph 2.0 is the durability. After flies and crashes the performance dicrese a lot, bt2 is better in durability and stable in time?

Would havbe been super interesting to see how an XT30 performs in comparison. Is the BT2 connector maybe still not enough? I used to run XT30 on all my tiny whoops before the BT2 came along and it was great. I am sure I was not the only one :-) So if you can manage it that would be great

My Inductrix would drop to the ground due to the voltage sag on stock connector (maybe was more sensitive than normal) a in first 5 sec. Thought it was junk but I saw a video showing a mod to the next higher size connector ph2.0 now I get 2min plus flights. Looking at BT2.0 connectors it looks like they would be better currant carriers but would they be lot better or just overkill? Plus hacking back into my quad be asking for trouble. wow $1.60/pair

2:20 he's on to something! did you test them then switch the same cells to bt2.0 awsome!

I actually switched over all my GNB 520 HV's to the BT2.0 connectors yesterday for my Tinyhawk S. Purchased the JESC licence, flashed Emuflight and threw in the PMB Diff Dump and she flies like a champ. Getting 5 minute flight times easily. Can you make a video about setting up BF4.1 RPM using the PMB tune JB for the Tinyhawk S?

I think I will update my mobula6 HD to bt 2.0. I already have a bunch of 300mah betafpv bt2.0 batteries that I got when I bought the Cetus. (Not a fan of it)

Using bt2 now on my 65mmwhoop, 0802 17500kV and notice up to 20sec more flight time up to 3:40 on 1s250mAh on original UK65 batteries but only 3:05 min on new GNB260... (Not charging to HV). It's an additional item to increase efficiency in the total drive train. I believe the next goal is not performance but flight times in tiny Whoops heading to 5minutes. I'm wondering if charging HV but discharge at low performance/duration might reduce cycles as well?

Why the heck is there still doubt? I build my first brushed whoop about 18 months ago with JST connector batteries… and instantly after launch the voltage sags down to 3.4V on hover. Then I decided to go for a XT30 on the same battery and quad. And after launch the voltage settled at 3.9V on hover… The flight time was doubled after the connector upgrade... And I will do the same on my Mobula7 now. BT2.0 is still too rare and on 2S I will go for XT30 connector batteries from GNB now.

The connector is important, Trashcan and nano tech 1s 300mah battery 3min flight with 0.8mm Gold Connectors with P.H 2.0 30 sec same battery. With brushed whoops the same situation is much more power and longer flight.

nice vid!

What about a solid pin ph2.0 from digikey? I agreed the folded pin connectors suck, but solid pin ones have given me similar positive results

I changed all my batteries . On my brushed whoops i did not see an advantage . On the 450 cells and brushless whoops i got longer times and higher voltages throughout the flight . I jumped right into them as soon as i saw them . On my 600 mah batteries i saw about 50 seconds longer flight times .

Test the JST XH vs P 2.0 you will be surprise. I get around 10% more out of my 1S than P 20

How do you attach bt2.0s to my tinywhoop? Do I need to buy an adapter?

How about compare it to NO connector? Solder the battery directly to the wires without connectors and see what optimal is like in comparison.

Just curious. But why was the last video where you were talking about your battery test machine removed so quickly? Also do I have to go through betafpv to get the plugs or are they available anywhere else?

I am using a ph2.0 connector on my mobula6, and literally touching the connector while plugged in alters the voltage reading on the OSD by almost half a volt. This is the same with multiple batteries on a mobula that's been through maybe 150 packs. Do you reckon swapping over to bt2.0 will solve this? I imagine the ph2.0 has worn over time..

My understanding is that after a few matings the PH connectors would perform poorly. I have batteries that no longer worked well for my whoop after a few uses. I would be interested in seeing how those batteries performed when the connections where changed. Would it bring new life to the batteries.

Now i wonder if direct soldering the batteries instead of using plugs at all is a "better" solution :)

What I see in your graphs is more mah in bt2.0 connectors vs ph2.0, (the red has less area under it then the the blue), given the same batteries were used where did the mah go to in the red lines? Did you randomize batteries in the order tested with the two connectors, assuming you used the exact same batteries for both. Or did you not use same batts, I assumed you did I think in the beginning you were saying not all batteries in a batch are going to test the same given same specs same brand. Also how many batteries were used, total? Just curious.

Looking at your results an all the comments, it seems PH2.0 is great for brushed tiny whoops that don't use that much power, but they just can't handle the kind of power that brushless quads use.

Anything on the horizon that might replace the XT60 on bigger quads?

the more ampere you have the more important is the ohm-resitance of the connector. So for powerful Tiny Whoops BT2.0 is clearly the winner...

maybe im wishful thinking, but im holding out buying another whoop/micro until they get HD. The sub250 channel hacked an airunit to fit in a 4inch toothpick. I think its gonna happen sooner then we think.

Ph2.0 sold Or crimped ?

nice

and i've spent all this time swapping my stuff over to jst plugs...