I love this setup. I have over 30 internal batteries and this makes it so much easier to Hot swap while I'm on the go. I can even use my 4amp charger without error. Some sort of cover for the external would be nice. With the heat here in Austin, my external battery temperature is often in excess of 110°

If you’re splicing power wires you can make it safer by keeping the 2 splices a centimeter away from each other just in case the black tape fails (good idea with those zip ties because electric tape always comes undone.)

@BananaScience

5 жыл бұрын

Ya that would be a good idea!

I am a retired engineer and it would be a good idea to make up "Y" pieces for the connectors and also when you're drilling a hole through the tube and the BMS only drill a small 2mm pilot hole and then when it's apart use a step drill for more control.

Super interesting stuff on the external battery front. So far you're the only one I've run into that has made a solution for this. Kudos! As I'm sure you are aware, there's a significant problem for modded Segway ES4's where the hard wired auto brake engages when the unit goes above 32-36KMPH. I noticed the brakes were engaging at a higher rate of speed at a full charge and as I went below 95% charge it started to engage at lower speeds. This led me to believe this was a power issue. I've been able to confirm it's a power issue by hooking up an external battery pack to the AC adapter that came with the scooter. While plugged in with additional battery pack I'm able to achieve speeds of 38KMPH without the brake engaging. However, there is a significant issue, when I stop the scooter it jumps into charge mode and in order to ride again I need to restart the scooter. Can you think of a way I can add additional juice to my external battery using the power port? If not, I was thinking about registering the external battery that came with my es4 as well as an additional battery that would join the internal battery as if it's one battery. If that's not possible, then I'd likely scrap the external battery that I have and wire two additional internal batteries. Would really love to get your feedback on this stuff. What do you think?

excellent work

Thank you for this

Thanks for the video. My understanding is that with the external battery adapter all that is left to do is wire the adapter to the new internal battery. Few questions. - Does this successfully unlock the faster speed? It's not mentioned but I assume so. - Will you offer the adapter on Ebay? I can find the holder but not the adapter (Canadian here). - There aren't too many internal battery vendors on ebay or elsewhere. Is this temporary (Covid related) or are there very few distribution channels?

Great tutorial! Thinking of doing the same for Air T15 but with aftermarket batteries; the OEM battery is 36V, 4650mAh. I prob want something equal to or less than 4650 to avoid over/under charge/drain. Also considering going with aftermarket for BOTH batteries with high capacity aftermarket (may need to dissemble OEM battery to get controller). Quick question about the wiring schematic. The Air’s battery wiring is a bit different. It has the XT30 (2 pin), but also a JST (2 pin, looks like red and black) and 4 pin unknown connector but wires colors are red/white/yellow/green (can see plug via ebay Air T15 battery). Any guidance on if I can just use the XT30 and JST or do I need something from the unknown plug??

I connected a battery in the connector that tyrae for direct external battery and without connecting the bms and the scooter detects it and does not give the percentage of external battery but it works correctly and being in parallel they discharge at the same speed so with the percentage of internal battery you can be fine

Maybe a bracket to make sure that both batteries are outside of the tube. Then have two spares in your back pack. And Or: A switch between the two different batteries.

Makes no sense to run them in parallel because of the issue that you wait until the end of the video to mention (about not swapping the external battery once the internal falls below 20%). That's a fatal flaw in your design. I applaud you on the total design, the effort, and the great video. The scooter should only run from ONE battery at a time, completely using each battery and then switching to the next. That would be accomplished by installing a user initiated switch that activates either the internal OR externally mounted battery. That way a person could use ALL of the juice in the internal, then hit the switch to the external (completely bypassing the internal). You can then use all of the juice from the external battery and swap that one out to another to as many as you can carry. No need to worry about the 20% issue. You could keep your entire design but simply add a SWITCH between internal and external. Great video.

@BananaScience

5 жыл бұрын

joey mcdonald Good idea! It would just have to be a really big switch.

@powerpopjoey

5 жыл бұрын

@@BananaScience why "really big" ?? You're just "switching" from the wires that go to the internal to a battery located externally. You would switch with the power off of course. There might even be a way to make an automatic switch, but that would be a bit more complicated.

@BananaScience

5 жыл бұрын

@@powerpopjoey The switch would have to be able to take around 600-800w of power. (around 20a peak). You could probably make an automatic one using a relay and an arduino nano where it just detected the voltage and switched it over.

@sysghost

4 жыл бұрын

I thought the same. Which gave me the idea of having both batteries externally. Makes it easy to swap both batteries at the same time, and always run on the same pair keeping everything balanced.

@BananaScience

4 жыл бұрын

SysGhost yup it would also allow you to put an additional ESC within the steering shaft tube and take advantage of the thermal capacity of the scooter frame to cool two ESCs for a dual wheel drive setup. We started designing a two battery setup but just stopped working on it as we had some other more interesting projects we wanted to finish up.

I was thinking a lot about a setup like this. I also found the possibility to build a custom firmware and there is the possibility to remove the "power charging mod" that means that your scooter can be driven while charging.is In your opinion a problem plug an aux 36v(8/10ah) into the original charging port and drive the scooter... I mean... Could that affect the original battery, that one get discharge by the motor and charged by the external battery as the same time. Does that affect the life of the internal battery?

Hi I need your help . I have changed my controller to a new one and on the new one there is 2charge+2UART connection for the battery but my battery has no UART(data) lines so I get the battery communication error . What can I do to use the new controller with my I believe ES1 battery without COM lines? Please help..Thanks

Hi. Would it be possible to use the adaptor for external battery to connect a 36v battery from an ebike if i use the positive and negative wires?

What are the Yellow and White wires for, which come from the battery? as I want to use a different battery in my ES2.

Hi I no this is an old video but I’m wondering if you where able to charge the internal battery’s with a balance charger 3s one if so what setup how did you charge the battery?

I tried this now my scooter is in pieces and I don't think I can get it back together lmao 😂

I have a non factory control board. They tend to fail too often. Is there a better board you recommend so to use this battery mod?

hello I wanted to ask if your external battery adapter for sale is valid only for the original internal battery used as an external secondary or it was also possible to adapt a new battery, I would have a broken xiaomi m365 battery and I would like to use it as an additional battery for the ninebot es2, could I connect the alternative in parallel by checking that they are at the same voltage?

Hi I have a ninebot es4, wanting to add a 3rd battery, connecting everything with a Dual Battery Discharge Converter Connection Adapter Switcher. Would the scooter reach faster speed and stronger torque?

Should I have information about longer distance to ride in ninebot aplication after this?

Instead of drilling you could just remove the external battery connector and use its hole.

Can you fit 3 battery’s ? To the same controller ?

Does Dashboard and Circuit Board for an foldable (those ones that sells on eBay and Wish) work for the Segway-Ninebot ES4 non-foldable??? When I’m looking at the pictures everything looks the same as mine (except mine has a green cable that seems to go nowhere). I have asked several sellers on eBay and they say it will not work for the non-foldable. If not why? Mine is an Segway-Ninebot ES4 non-foldable and branded with VOI.

Great video. I'm looking for the info how I can add a THIRD battery to ES4, but hasn't found anything yet. I think it is great way to extend the range by having third external battery, say in a backpack. Do you know anything about such thing, maybe you can make a video about it?

@carlobicchieri2667

Жыл бұрын

Hi, I wanting to do the same, did you have any progress? If positive please let me know how you did it

Do you have the 3d model for mount it on a M365 by XIaomi? Thanks!

How cai i get the batery. Two Black brackets.?

Nice

Can I run a ninebot controller off two internal batteries ? Then is this what this dose technically

It looks like you have a real idea of ​​the ninebot scooters. I have an ES1LD and it looks like everything is different about this scooter. I wanted to make it a little faster. The scooter has no bluetooth. The internal communication is probably not 115200 baud. There is no connection for an extra battery. And the engine is a more sensorless one. Are there also CFWs for this?

Que ganas de complicarte la vida😂, los ingenieros de ninebot ya hicieron ese trabajo para añadir la batería externa sin tener que hacer nada pero aún así bien trabajo

Do you have any more information regarding the external battery adapter you linked to in your description? Possible to buy it directly from your store with all parts included?

@BananaScience

4 жыл бұрын

There's more info on the thingiverse page linked in the description and I'll add it to our store at BananaScience.net right away. Thanks!

@BananaScience

4 жыл бұрын

www.bananascience.net/product-page/ninebot-esx-external-battery-adapter-kit

?where ru locate,i want to bring my scooter to you for installation.

Крутой проект, но есть замечание! Он так показывает, заменить можно за 30 секунд, но блин, если подключить новую заряженную батарею параллельно разряженной - заряд начнет выравниваться между батареями, одна будет заряжаться безумными токами, другая разряжаться. Вполне может перегреться и бамбануть. Заменять батарею нет вообще ни какого смысла! Нужно использовать обе одновременно.

mate i think you the only can answer. I'm pretty sure answer is here in the comments but I seems too stupid, so basic internal and external batterys aren't in parallel? But still I better not use a multiply external batteries after I discharged internal coz then they gonna need to repalance and explode (based on comments)?

How you are able to charge two batteries which have two different BMS with only one charger?!…all I know is not recommended since each battery can charge differently

Hi, may I know if the original external battery is also connected in parallel with the internal battery like yours? The original/factory design will increase the maximum speed. How about this one?

@BananaScience

4 жыл бұрын

TM HO The original external battery is connected to the internal one in parallel but through two N channel FETs which can regulate its power. This won’t increase your speed but will double your range. We are working on a video at the moment where we repurpose an internal battery as an official external battery.

А где взять Образец на 3д принтер Что бы распечатать ?

one other random thought has anyone tried to do a AWD front and rear drive on a ES scooter? would be interesting if you have the available parts. I believe the front and rear tires are the same size.

@BananaScience

5 жыл бұрын

Yup. We've done it but not in a clean package yet. Might make a video in the near future.

@jman89

5 жыл бұрын

BananaScience it would also be cools if you give quantitive data. Stock firmware, 44000, 38000, stock external battery, your external battery). And show time to full speed or time to climb a consistent hill, etc

@BananaScience

5 жыл бұрын

​@@jman89 Since the Ninebot ES scooters already have so little power, I would just suggest running the lowest safe MPC for your scooter setup and weight. I'll see if I can put together some data though if I get time.

Dear,i have my internal battery dead. Is it possible to wire external battery to internal connectors?

@BananaScience

4 жыл бұрын

Juraj P. I don’t think so just as you can’t wire an internal battery into the external battery port.

This doesn't really make sense for a "multiple battery setup". Won't swapping the external battery with a new one once dead lead to unbalanced voltage? The bms on the batteries will probably get blown because of the high voltage differences.

@BananaScience

4 жыл бұрын

Check the comments below. I agree that it's a bit sketchy but it seems to have worked out okay and the BMS's over current protection is pretty effective.

there is already a connection to the outside via the standard battery holes (power / data / charge). why not just rewire those so the feed directly into the charge port and the speed controller instead of the dual battery wiring?

@BananaScience

5 жыл бұрын

The scooter will detect an external battery error and won't move. The charge port is wired into the ESC with what looks like 20awg wire so it would melt if you tried to run the 400w necessary for an external battery through it.

@jman89

5 жыл бұрын

BananaScience disconnect the current wiring for the stock external battery (xt style connector and a 4 pin connector). Then require the xt to the speed controller and use the 4 pin to wire to the balance leads

@BananaScience

5 жыл бұрын

@@jman89 The scooter will read an external battery error. I think I talk a bit about this in the video.

@jman89

5 жыл бұрын

BananaScience I understand it won’t work as wired, I probably did not explain it well. A picture would help

@BananaScience

5 жыл бұрын

@@jman89 Feel free to contact us at banana.science.awesome@gmail.com if you want to send us photos and have a more detailed discussion.

Hello, do it on 21700 batteries!

So...i want to know because you dont plug the wires with the external plug

Hey. I’m thinking of doing this to add 3 external batteries. An extra speed controller. Dashboard and rear motor to my ninebot. Do you think that would work?

@adamrice3286

4 жыл бұрын

Did you end up doing this? I’m looking to add an additional external beyond the one I already have...

@FuzzyMealChosenOne

4 жыл бұрын

@@adamrice3286 i added 2 extra battery and a rear motor.. i blew something in it now my scooter doesn't work good.. i wouldn't mess with it.. get a ninebot max if you need more range.

Where are you finding these replacement batteries? I can't find even one in decent shape

@swaveydavey1113

3 жыл бұрын

he took em

Daca avem vrun roman care doreste sa cumpere acel adaptor din video, ma poate contacta. L-am printat si nu se potriveste pe modelul meu de trotineta.

how do you charge the external battery?

@BananaScience

4 жыл бұрын

You can charge it from the scooter or just wire in a 42v power supply into the charge wires.

hello hello, could you send me the zip to edit the fimware for the second battery, the zip thank you

What's the power of the ES4 External Battery Vs the Internal?

@BananaScience

5 жыл бұрын

I'm unsure of the exact max amperage but I suspect they are pretty similar.

@STJrArmonte

5 жыл бұрын

@@BananaScience How many do you have? External batteries for this project

@BananaScience

5 жыл бұрын

@@STJrArmonte Heh... like 12 or something

@stanleytsang3242

4 жыл бұрын

do you think to adding 2 external batteries (TWO original ninebot battery)is easier? do you think that would work?

plobem es2 not charging

I have connected an internal battery on the external battery port, and works fine, doesn't give me error 42.

@BananaScience

4 жыл бұрын

Could you please send us a photo of your setup to Banana.science.awesome@gmail.com please? That would be great if that’s possible.

@Marconiativu

4 жыл бұрын

Very good!!!!! How did you do it? Could you also send me photos of your work? 1000 thanks. Please send yours photos to prudinet@icloud.com

@IzaakHagy

4 жыл бұрын

Sorry to be the third person to ask, but could you share some details? Either here or you can email me at izaakh(at)me(dot)com

@dominikvrbic3482

4 жыл бұрын

sry I would like to know how you did at as well. Here is my email dominikanime@gmail.com thx

@Adrian-R.

3 жыл бұрын

Hi, could you send me some details about your setup? Thanks ady_rap@hotmail.it

my battery has a red light. How could I solve it?

@jordansmith4426

4 жыл бұрын

You Red Light means a bad cell. Either check each individual, or aquire a new battery.

I call it steering column

The speed after this is the same or it is faster

@BananaScience

5 жыл бұрын

Same speed but slightly increased torque due to the greater amp potential from an additional battery.

You made it too confusing showing 2 ways to wire it and too many be careful and do this. Which setup were you wiring? Why did u remove the charge port on esc then put it back on? If you do step one wiring does anything even go to esc besides the original plugging in? Because I simply would like to know if I just splice on to the battery to the internal battery and plug it in like before.. ?? Wtf

Now I gotta go and get a LIME scooter and take off the battery for me

Have you guys figured out how to make a non foldable electric scooter into a foldable one??

@cddamiao

4 жыл бұрын

it´s possible and quite easy, i made tha to 5 scooters already, all with the same methood.

@JuanVargas-ix5ft

4 жыл бұрын

@@cddamiao How did you do that?

@oeriel

4 жыл бұрын

@@cddamiao Can you give some info how to make it foldable? Here or oeriel@gmail.com

why the hell wouldn't you remove the esc electronics before you drill the hole. that way there is 0 chance of any damage while drilling the hole.

@BananaScience

4 жыл бұрын

Gillian Nicole Valid point! Thanks for the suggestion!

@toddcoye8856

4 жыл бұрын

To confuse the fuck out of people

@alexdeko6847

3 жыл бұрын

This f ing a hole wants everybody to fail that's why

This is a ninebot sharing scooter.

Timer+Blacktube+electric wires= Bomb defusing!

Store link not active?

@BananaScience

5 жыл бұрын

Just fixed it. Sorry about that!

@MisfitSince85

5 жыл бұрын

BananaScience How would I get in touch with you guys? I recently acquired an ES4 from an auction parts car and would like to get it up and running and find an OEM Dash or one that works well.

@BananaScience

5 жыл бұрын

@@MisfitSince85 You can contact us through our website: www.bananascience.net/

Fuck this shit. Just gonna buy an external official

if you still have your es4 you could consider making this crazy mod kzread.info/dash/bejne/foh6rracc73gmLg.html

Im guessing you were awake for 2 weeks straight when you recorded this. About 90% of the information in this video is unnecessary. It's like you're trying your hardest to make people give up. BUT WHY??

Too much work 😂😂😂 i rather just get the Segway external battery. By the way i have 2 spare es2/4 external batteries i am selling out if anyone lives in NYC and it’s interested in

no tiene sentido.

Dude, you should not promote that kind of ideas. You CAN'T connect two batteries in parallel with different voltage potentials. A lot of stress for the batteries is least of your worries. There will be fire and smoke if the difference will be high enough.

@BananaScience

5 жыл бұрын

Rafał K. Yes the internal battery will be under a lot of stress when a new external one is wired in. If these batteries were wired directly in parallel without a BMS it would undoubtably cause a gnarly fire (typical cell difference shouldn’t be above .2v). However, the integrated BMS regulates the charge current and prevents such a fire. I’ve done extensive testing on this and haven’t had any issues so far. When charging from 20% from a full external battery, the internal one doesn’t even get warm though it charges on and off as overcharge current protection kicks in and out until both batteries have reached a similar voltage.

@webbpw

5 жыл бұрын

@@BananaScience Did you try to wire second internal battery as an external one? Wouldn't it be recognized by the board as an external battery? Then you don't have to worry about voltage differences as there are two MosFETs on the board that are connecting the battery with higher voltage, and disconnecting the battery with lower voltage. 18650 batteries should be charged with 0,5 - 1C to prolong their life and for safety reasons. When you connect two batteries with voltage differences in paralel then you will charge the more drained one with full power of the BMS, probably around 30 - 40 amps, which is around 6C - 8C or more... this can't be good for both batteries. I would redesign the project :) I don't even charge my Lipo batteries which such power, and they are rated for 5C charging :)

@BananaScience

5 жыл бұрын

​@@webbpwYes we tried to wire an internal battery externally through the XT30 and mini molex connector which compose the external battery port. As we explained in the video, it detects the battery though reads out an external battery error. There is no MOSFET on the ESC that connects the external battery and disconnects the internal one if you wire in a fresh official external battery through the external battery port. They balance each other out just as they'd do if you were to wire them in parallel in our video. If you actually take a multi meter and measure the connectivity across the XT30 for your internal battery on your ESC and the XT30 on your external battery port, you will see that they are directly connected and not regulated by a MOSFET. Yes, this mod isn't the greatest for your batteries though when balancing out, the current between batteries rarely goes above 10a (assuming you don't wire in a fresh battery once your internal one is below 25%). Since the internal batteries are in a 10s 2p configuration and use EVE 26V model 18650s which suggest a 1c charge rate (2.55a), the balancing is only a little over 2c. Furthermore, the BMS on the internal battery cuts off charging if the current gets too high. I'm not saying this is a perfect (or safest) solution for a modular range extension but it's cheap, relatively easy compared to the alternatives, and has a multitude of safety features in place to prevent a lithium battery fire.

@webbpw

5 жыл бұрын

@@BananaScience check the board on the bottom side. And you will See that each of the xt30 plugs is connected to one of the first two mosfets. For sure they are connecting and dissconecting the batteries. No doubt about it. Maybe you were mesuring it when mosfets where in conductive state. Another thing is that you need to have two mosfets for each phase on the ESC so eight of them is not needed. Thats why first two are for what i wrote.

@BananaScience

5 жыл бұрын

@@webbpw Thanks, I'll check it out. They are N channel FETs so I must have had it on when I measured (stupid me lol).