Repair a Swagtron Swagger 5 (Xiaomi M365) Electric Scooter battery: Soldering tips for 18650 battery 

Thank you for posting this video! My son's had the same issue and I was able to repair myself thanks to you. Couldn't find any repair shops willing to touch lithium batteries. You made my son happy... thank you!

I had my scooter about a month before the battery shorted out.. It's been under my bed for a year. After watching this video, I'm totally going to pull iit out right now. good luck and be safe everybody!

You really know your stuff. I've been using mine for two weeks now, and your point about the board leads me to seriously consider opening up the bottom and putting cable ties as yours has it to at least slow down, if not prevent, the nickel strip separation that you had to repair with yours. It's an otherwise excellent scooter, and I intend to use it for several years.

I went through 5 swagger 5s and I FINALLY know why they keep breaking down. Thanks!

Nice repair sir. Should hold up well with the double layers and those relief corner bends. I have a spot welder for making large packs, but on smaller tool,/appliance/mobility packs I still find it easier and faster to solder. A few tricks I have to minimize cell heating and contact resistance: -scuff the contact surfaces with fiberglass scratch pen or fine sandpaper; lightly pre-tin the mating surfaces -slightly chill the cells short time in the fridge or with a puff of freeze spray on the joint just prior to soldering (I use inverted canned air, but be very careful of frostbite!) -hottest iron setting, clean tinned tip, leaded solder, extra flux - all to maximize wetting and minimize soldering contact time to a few seconds. A powerful iron also helps to avoid premature cooling/ pooling - (the finished joint should be smooth surface and not resemble an arc weld.) -hold the tab down with a sharp pointed non-metallic stick (eg a kebob skewer or toothpick) to maximize direct tab to tab contact in the joint -as soon as solder turns solid remove the stick and dip a cotton swab /q-tip in a small bowl of alcohol and immed place on the joint to suck the heat out, then use it to clean off the flux Thanks for the vid. That scooter runs nicely!

Helpful repair video, thanks. Although I wouldn't recommend wrapping up the entire battery pack with foam sheeting is necessary as it will act as a thermal blanket and retain heat which may shorten the lifespan of the cells especially within hot or warm climates. 3" x 1" x .5mm foam strips shall suffice in providing generously adequate shock protection.

Thank you. This is the first time I have seen the batteries insulated using foam and tape instead of heat shrink. I have a Swagtron e-bike and my batteries no longer charge to the full 42 volts. I'm going to inspect them.

Would like to see a controller upgrade for the swagger. Agreed that it is small and could use an upgrade. I would appreciate a video and/or link to one that you would suggest. Great video, nice work.

I seriously went "Woooowwwww" when he retested the voltage after the repair. I'm so impressed. I've been so frustrated with SwagTron and their repair policies/procedures. I would GLADLY pay someone to repair my Swagger 5 locally. I don't suppose you live in Los Angeles??

As usual great content!! I thought for sure u were going to put two Kobalt batteries on it. Maybe when the other batteries die

Nice work, just need some pretty shrink wrap. Like the back pack idea for higher voltages with kobalt battery's to test. Keep it up.

Great video thank you for your help

Good video. Just one thing, you're applying to much heat to the battery. I know there is a nickel strip between the cell and the soldering iron. Nickel is a good conductor of heat. I repaired my broken battery terminals with tinned copper braid. It has been working for 2 years. Then the BMS failed a year ago. It would not charge the battery at all, but still powered the motor. I replaced the BMS with a generic 10s one and so far so good. I also added an external 10s4p pack to more than double the range. I charge them separately. It works well because I don't connect packs of different voltage together. BTW the front tire on mine was shit from day 1. It constantly leaked. I replaced it with an airless tire like the rear and have had no other trouble

I find when working with Li-Ion most of our safety and quality protocols call for any tab that directly touches a cell to be Spot welded. Hot soldering iron has the possibility (limited of course) to ignite the li-ion cell. You never know when there might be internal unseen damage with a cell that will cause it to react to a hot soldering iron.

I'm interested in a breakdown and upgrade for the swagger 8. Can you do that?

Very nice video, thanks for your time

Good job sir

That looks pretty cool 😃👍 love the battery pack. 😋

Nice wrapping of the battery....can u do my christmas presents?😆 Hey jr eco is not so jr anymore since the last time he tested for you, does he take as much interest in your eco passion, or couldnt careless 😁

thank you for this video. very helpful. do you have a video of replacing the controller or overriding the speed limits of this model?

Only 1 recommendation: use AT LEAST a 60W soldering iron (i suggest a cheap blue one with a simple temp. control system (a variable resistor)).(the problem of those soldering points is the temperature, since it's too cold the tin wont stick well (like the previous soldering), while, at around 325-375 c° the tin will melt instantly.

Do you know where to buy a replacement battery and charging port?

Buen Dia. Tengo una pregunta. Mi swagger 5 lo cargo hasta que marca batería completa. Lo uso y al corto tiempo digamos 4 mins de uso se apaga. Será la batería o la rueda?

Good job but ..how the those cells vent if covered with foam?

You do excellent work, I was hoping you might be able to do a Hiboy Max electric scooter mod!!!

Damn, you are amazing!

Just folded my e5 to test for correct voltage. I’m getting 37.4 volts on the battery side but my controller side is showing same. The switch is off. Why is the controller side showing voltage? It’s alive and I’m afraid it will short out due to the male contacts.

That's some serious point of failure you spotted there, Nice. Where would one find the restrictor wire on a pure air e scooter XD or is it software-based?

Question what if I am not getting power to my red and black wires at the plug but I'm getting full Voltage at the battery pack?

Excelent!

I'm considering upgrading the battery on my hiboy s2 pro. But I saw a video on the ninebot where the battery was upgraded with a higher amperage battery but the phone app does not recognize the new size of the battery. Does the xaiomi scooter exhibit the same battery display like the ninebot? Also the generic batteries require data hook up up to connect to the scooter that have this cable. As a curious note, since the ninebot sees the old battery size. What happens with the scooter when the phone app see 0% when there is actually say 20% as an example.

Hey there! Was wondering if you could help. My individual cells are 3.51 and not 4 does that mean they’re bad? I’ve soldered them back to the board connections but when I test the positive and negative it still shows 0v. Could it just be that the board is bad or a combination of things?

Should alternated the zip ties to help keep the battery ends from touching the chassis

Can you tell me which one better( G1 and G2 Nissan Leaf Battery) thank you so much.

How can I fix or replace the light? And how to tight the handle base to the support pole?

Where would I splice in an auxiliary battery for my e5? Battery side or controller side?

Great Video, sir!!

Hi . I Have taken on a project scooter that is not working and looks like your battery pack here. Are you aware if there is a ''Z'' fuse as shown on some other YT videos . I am having a troubling message/problem there is no communication with the battery (ERROR 21). How does the BMS talk to the mother board ?? Is the Bluetooth emitted from the battery BMS board ? Hope you might be able to help me a little here . Best regards Don

The rear wheel of my scooter does not move even a little bit. When I bought it it worked perfectly, we used it twice and it was two months without using it and suddenly when we wanted to use it it turns on but it doesn't move.

Where can I buy a bms new dash board and bms?

Hi guys, hope you all well. Does anyone know how to change existing connector on battery to right one. (ordered new battery but wrong interface connector came) thanks a lot

I have a question, about the control module. I have this model scooter, and it rides then turns off, it charges sometimes, and I notice if I tap around the control module it’ll turn on but only for a split second. Help! How can I work with you

hello i fixed the battery the way you told us test terminal to terminal is over 40 volts but testing red and black wire like you said i have no voltage can you help me and tell me why?

Im Sean from New Bedford , I have 2 swagger 5's and they are slow about 14mph and im only 160lbs...... How fast is yours and what can i do to make it go fast as possible my Cambodian Brother...

Where can I buy that circuit board soldered to the battery ???

Hi my scooter is always is at 100% and turning off random times xould u tell me how to fix

Can u please help me bro mine says e5 I'll be riding it and it'll just cut off after a certain amount of time

We’re do you get a replacement battery

Look I have a Q30 I'm trying to take the stand deck off so I can change the motor and I got the screws off but I still can't take it off any one have ideas

What temperature did you have the solder at?

im having problems with my scooter can u help me

Where do you get it from

did you do a video on fixing the power button i can't find it and i need to fix mine ???

The whole apartment burns down because of such repairs. sad.

Hi do you know if a genuine xiaomi m365 battery will work in one of these scooters thanks

I have 2 of the same schooters where can I find something like a replacement battery for these scooters

Yo bro I need your help mine died and the charger works but it won’t charge no more do ik a new battery ?

The swagtron swagger 5 boost version is better.

Too long heating time while soldering. This is very dangerous for batteries.

Everyone wants to no where to buy a replacement battery.

⭐⭐🌟⭐⭐

first

Wow. Awful craftsman