I love to hear the success stories, thank you for posting!

That’s outstanding! Isn’t it great when you can bring something back to life? Hope you have some fun glides.

Hey that’s great to hear! You made my day. I kind of made that video just on a whim because when I opened up the Segway I didn’t know what to expect. But I had a good idea I could find the problem. It seems to be helping a lot of people and I’m really glad to hear that you are back in business now. One word of caution, be careful on that Segway. The other day I ran into a raised portion of a sidewalk and instead of just bumping up a little bit like every other time, the thing threw me up and backwards into the air and I landed on my back and hip on the sidewalk. Ended up in the emergency room. I’ve got hundreds of miles on this thing and that’s the first time anything like that has happened. And it was instant. Ride carefully!

Great news! Merry Christmas.

Great! You are now an expert at Segway batteries!

How did you jump the charger? i hit reset and nothing except red light inside on board?

@@jjqchomes8443 In the video I showed how I connected the charger plus and minus output to the battery plus and minus directly. I didn’t have to do anything special with the charger because it puts out a regulated voltage. I just used some small gauge wire, I think it was 22 gauge solid core copper wire to make the connection.

Yeah, when I made the video, I was expecting to do a complete battery pack teardown. I wasn’t expecting to find a single reset switch. But anyway glad it worked out.

@@rjmorgansd so you can literally just press it? What about the lil black button that says RESET

@@kevenramos7871 the little black button that says reset is the one that we are all talking about here. There doesn’t seem to be any harm in pressing it, and it seems to reset the battery controller to allow a drained battery to charge.

This is probably a dumb question, but how do you press the button. I see it looks like a small pin prick sized hole. Do you just stick a needle or something in there?

So glad to hear that! I like stories with happy endings. Enjoy it once again and be sure to put it on charge at least every couple of months when you aren’t using it.

It could be. I didn’t take the time to put my scope on it which would probably give the answer. Typically the reference designator S, or SW refers to a switch. But since that is a test header it’s a little bit unclear what SWM stands for.

That’s great! As I was making that video, the engineer in me was saying “don’t press that button”. I’ve learned to not push buttons when I’m not sure what they do. But I’ve since received many comments that this button appears to solve the problem and that’s really great to hear that it’s going to be a simple fix now. Thanks for the reply, and happy gliding!

Should I press the S1 or reset?

@@Nadeaux4 Reset only works for me. Good luck.

Try S1 first

You could probably start a business if you get some of those running! Good luck, read through some more of the comments in this thread and you will see what other people did that worked.

Still awaiting the update!

It appears that fortvalor did not survive this battery revival experiment... we honor his valiant attempt and unfortunately his ultimate sacrifice in the name of science... rest easy brother

Sounds like that battery is down to less than 50% capacity. I would either use it for shorter trips or if you really have fun on the Segway just get a new battery.

59.4 V is fully charged up. You have a different issue going on. Maybe the switch to turn the unit on isn’t actually working. But the battery is just fine.

If you’ve got 59 V at B+ and B- that’s the measurement of the entire pack, which is good. You might try pressing that button labeled S one and see if that does anything. But it seems you have good batteries which are not below the threshold that most other people have encountered. When the batteries go below about 40 V or 42 V, somewhere around there, the system goes into a hibernate or standby mode. Pressing that button seems to bring it out of that mode so you might give it a try. But it looks like you have a good battery pack and your problem likely is elsewhere.

You’re welcome, hopefully it helped get your ride going again.

I’m not familiar with any other Segway circuit boards, but one thing you could look for is a place for the switch on the circuitboard but they didn’t actually populate that part. However the two little conductive pads for S1 might be there. If you find it you could take a piece of wire and short out those two pads momentarily. You might also carefully look around for a reset button or switch or two pads that are close to each other that are labeled reset or RST, and do the same thing. Did you try charging up the battery using the method I showed? That might also help.

I did find the RST labeled but other than that even the labels seem to differ. I've been trying to charge it directly to the female banana plugs with bare wires but it just blinks red as it would from the actual charging. I'll open it up once more to see If there are any s1 labels. My phone actually finds the bluetooth connection momenteraly as the whole thing is charging wich tells me there is some Life in it

That’s a good solution, and would probably work for most people. Since it has regenerative braking it doesn’t have a diode in the output of the battery connector so there is every reason to believe that should work.

@@robertmorgan2145 Yes, it does work. I did it today. I have to mention, that I still had about 56V on my batterie. So a lot more than those in the video. My Mini Pro could also be put on and the app showed about 5% of batterie status. The only problem was, that the charger did not start charging. Charger LED always stayed green. After having pin 1 and 2 of the charger been connected to the 2 big sockets on the batterie for about 5 minutes, the charger accepted the batterie at the charging port and I was able to charge it normally.

Got mine new, the battery was Doa, called segway they sent a new one, and it was just a simple quick battery swap, that was 5 years ago, now mine started doing the beeping thing he spoke about in the beginning of the video after a year of not riding, but i just left the charger beeping for 30 minutes and it started charging by itself, no fix needing.

You could certainly try that. Just make sure you get the polarity correct.

If you watch my entire video I show you how to hook up the charge leads from the charger directly to the battery terminals. That bypasses any charge circuitry that might be between the charge jack and the battery pack itself. If the battery pack is anywhere above maybe 40 V or so it should come back to life.

Let us know if it works after pushing the button!

@@rjmorgansd I'm working on two of them. The one I charged last night is at home. I'm at work now and charged the other and pressed the button. Green LED is on! I'll press the switch on the other one when I get home. This video was incredibly helpful!

@@tomcatpilot15 glad to hear it! I think you’re going to be in luck. As long as the battery didn’t reach a critically low level to where the battery cells reversed themselves, pressing that S1 button seems to reset the battery controller and get things working again.

@@rjmorgansd the batteries were at 42v when I tested them before charging

@@tomcatpilot15 you should be able to recover that pack just fine. 42 V is a good voltage. If it was down around the 20s or 30s I would be concerned about it.

That’s beyond the scope of this discussion. However in general yes you can parallel lithium ion batteries, however it requires them to be very closely matched in charge level and capacity. I assume you are talking about charging the batteries individually in the normal fashion, and then connecting them together in parallel to give greater capacity. Something like that could work.

@@robertmorgan2145 sorry for asking on this video but you seem like u know alot of how these things work,if i buy a spare s max battery would u help me figure out a way to do it?

That sounds like some sort of internal electronics failure possibly in the charge circuit. That is rare. Maybe try charging the battery manually a couple of times yourself and see if it goes away.

@@robertmorgan2145 hi! Thank you so much for replying. What do you mean by charging manually? Right now when I charge it, it looks like it’s charging (bars going up and down), but the light on the charger is still green. How would I charge it manually? Thanks again!

Tht means yr batt is old, tired or ded.

@@robertmorgan2145 it's crazy how wen I only hav like 4 month with it

Good to know, thank you for contributing. Sometimes you don’t discover things until you get deep into it. And initially I was expecting to find some bad batteries in the pack, but in any case this thread has added a lot to the base of knowledge and has helped people get their dead Segways going again. Cheers!

It sounds like your batteries are showing near full voltage however you’re not getting it to the output port. Maybe look for a blown internal fuse or a loose connection, because I doubt a reset would fix this problem of yours. But if you want to give it a go, just briefly touch the reset pin to ground.

Thank you for your reply! I did that and grounded the RST pin to the wall plug and nothing happened as you said! I charged it for three more hours from B+, B- and now charged to 59.6v but 5.4 on banana port! I don’t see any fuse… any other idea? Thank you again!🙏

It sounds like your batteries are just fine, but something is interrupting the voltage from getting to the output port. Usually that would be a fusible link, which is nothing more than a large fuse. It might not be obvious but check the red positive wire very carefully for either a lump under the wire that could be an in-line fuse, or maybe it lands somewhere on another circuit board and goes through a fuse type component or some type of circuit breaker before it gets to the output where you are trying to measure the voltage and only getting 5 V.

Thank you again for your reply and attention! I owe you please provide me with a PayPal account so that I can thank you! I short the rst-gnd and nothing changed but checked some voltage may help you solve the problem. B+B- 59.5v B+ and banana- 5.4V B- and banana + 59.5v Banana + and banana - 5.4v It seems banana - line is problematic. My banana plug and cables glued with a white thick glue and I can’t see any fuse there grossly, but didn’t open it yet scared of breaking some piece/board.

Looks like you narrowed it down to the ground wire from the battery to the banana post as being the problem. So there are one of two possibilities. Either there is some fuse that is blown, and the fuse could look like a piece of wire if it’s a fusible link. It might not be what you are expecting to see like a thin piece of wire inside of a glass tube. Sometimes fusible links are just a certain thickness of wire. The other possibility is that there is some electronic switch that breaks the connection from the negative output in a case where the battery isn’t installed or something like that. It could be some type of safety or protection feature. Since I don’t have my battery open I can’t see the circuitry there. Don’t be afraid to peel away the white goo. It’s just there for vibration protection so the wires won’t break out of the board while you’re riding it. You can always replace it with a hotmelt glue gun, that’s all it is. You could also take a short piece of wire and bridge the connection from B minus to the negative output post and then see if you can measure the voltage there. But if there is a safety circuit engaged keeping the voltage from appearing at the negative post that still wouldn’t solve the problem. Keep looking, you will find where the connection is broken by following that wire very carefully.

Another battery saved! Good deal.

My philosophy is 'first do no harm'. If all else failed I'd push it. But when I don't know what I'm doing I do it very carefully and don't just start pushing buttons. Having said that, thanks for letting us know that it worked for you. It may help other people. I added your comments to the video at the part when I pointed out the switch.

Do you suggest pushing S1 or reset?

@@Nadeaux4 wheres the reset one?

My board does not have any reset button like you show. Any other suggestions please?

S1

That’s great to hear! I’m trying to find a way to update the video and tell people to go ahead and push that button because it does indeed seem to solve the problem. I was just hesitant at the time I made the video because I wasn’t sure what it would do. I figured with my luck it would erase the motherboard or something.

Did you push the S1 or Reset?

Does it still run? And was it that little s1 button? About to try it today!

I pushed it and it just flashed red…

@@SmileyReviewsmine just blinked red.