New 80 volt push mowers

[Tyro65]

If connected in parallel then they should stay connected all the time to keep voltages at the same level. Then the benefit of having easily replaceable battery modules is lost or reduced. How are you going to charge them?
- Greenworks 60V battery is 15S li-ion cells, 63V at max charge. Is it OK with your controller (doesnt it expect either 48V or 72V battery)?
I have nothing against Greenworks batteries, they are built well, the only gripe i have is that there's some DRM in their electric tools that forces you to use only original batteries.

I've had the controller running 60v: five 12Ah SLA bricks. It will handle 72 volts too. DRM -- a cheap way of staying proprietary.

 

[q9104]

Hi there,
I have various Greenworks devices that I would like to use with other batteries.
I looked at the signal and wrote a small program based on it.
the program is designed in such a way that you can easily use other battery types.
unfortunately i don't have 60v and 80v batteries and can't reproduce the signal for them.

since the signal pauses are always the same length, i only need the pulse lengths and number of pulses, and what for battery and manufacturers.

Like this:
View attachment 309665
like 1x400 3x200 13x102 .....

then i can include it in the program, maybe we can create a list with which manufacturers and battery types it works?

here the program

GitHub - softwarecrash/OmegaFaker: A Faker for Greenworks GW and other Battery types Omega Port faking

A Faker for Greenworks GW and other Battery types Omega Port faking - softwarecrash/OmegaFaker

github.com

sorry for the bad english, greetings from germany

PS: adapted @plmicia signal timings for Powerworks 60V and from @StinkyGoalieGuy for Greenworks 60V, can anyone confirm that it work?

The code did not work on my Greenworks 40v model J18 wireless chain saw, which stopped spinning after 3 seconds. Do we have an updated code that matches? If so, can you share it with me?

 

[Protexpro]

Hi there,
I have various Greenworks devices that I would like to use with other batteries.
I looked at the signal and wrote a small program based on it.
the program is designed in such a way that you can easily use other battery types.
unfortunately i don't have 60v and 80v batteries and can't reproduce the signal for them.

since the signal pauses are always the same length, i only need the pulse lengths and number of pulses, and what for battery and manufacturers.

Like this:
View attachment 309665
like 1x400 3x200 13x102 .....

then i can include it in the program, maybe we can create a list with which manufacturers and battery types it works?

here the program

GitHub - softwarecrash/OmegaFaker: A Faker for Greenworks GW and other Battery types Omega Port faking

A Faker for Greenworks GW and other Battery types Omega Port faking - softwarecrash/OmegaFaker

github.com

sorry for the bad english, greetings from germany

PS: adapted @plmicia signal timings for Powerworks 60V and from @StinkyGoalieGuy for Greenworks 60V, can anyone confirm that it work?

Hi!!! This is exactly what I am/was doing yesterday. I have a GreenWorks 40v lithium battery charger, model: 29482, and the battery is a GreenWorks Gmax 40volt lithium 4.0ah battery. Well, I was trying to charge this other battery I have for a hoverboard, but couldn't because, well you already know. I did lots of testing and finally figured out that yeah, the ohm port/pin on the charger is looking for a data signal from battery. I stopped at this point because it was late, anyways, I just found your post and program, and wow, Thank You!

I have not tested yet but, I am soon. My question is though, if you need any readings from my battery and or charger, let me know, and I will get them for you, so we can add them to the program. I suspect my battery is already covered though but, who knows, maybe its not. I have listed the official name and model of the battery charger and battery I have below.

PS: Just to get the board charged yesterday, I said F it and just went the easy/annoyingly tedious route and tricked the charger by connecting both the batteries to the charger at the same time using an adapter I 3d modeled and printed. I'll upload and link to that here shortly.

_________________________________________________________________________________________________________________________________________
* BATTERY / CHARGER SPECS *
BATTERY CHARGER:
GreenWorks 40 Volt Lithium Max
Model: 29482

BATTERY:
GreenWorks 40 Volt Lithium Max (Gmax) 4.0ah
Model: 29472

 

[Risky Rob]

I just ordered the 40V Greenworks push mower on Amazon for $160. I already have 3 batteries.

 

[yooper2001]

Make sure you buy a spare blade for your electric mower, and keep them SHARP!!!! I was surprised just how much battery life dramatically changes as the blade dulls.

 

[OlderGiantFan]

And grass length, mow before it's too long

 

[Log8]

I've been following this thread for a couple of years now. Standing on the shoulders of giants such as meatlover and stinkygoalieguy, I've been sniffing out the code on the 24v greenworks batteries. I have a little mower that I actually really like for some reason, so I'd really like to power it with something north of 4aH.

here's what the waveform looks like by the way. I'm hoping this is all correct because I connected it to a 24v 3d printer heating bed, so who knows I guess. I'll update when this inevitably fails.

anyway, here's my code, written with the help of Gemini because God knows I can't write code to save my life.

// Greenworks 24V Omega Port Spoof
// Timing: 97.2ms Interval | Sync: 648us | Data: PWM Encoded
// Based on Logan's Saleae Captures (March 2026)

#define OMEGA_PIN 3

const unsigned long PACKET_INTERVAL = 97; // Your measured 97.2ms (rounded)
unsigned long lastPacketTime = 0;

void setup() {
pinMode(OMEGA_PIN, OUTPUT);
digitalWrite(OMEGA_PIN, HIGH); // Idle high
}

void loop() {
unsigned long currentTime = millis();

if (currentTime - lastPacketTime >= PACKET_INTERVAL) {
lastPacketTime = currentTime;

// 1. SEND THE SYNC PULSE
sendPulse(648);

// 2. SEND THE PWM DATA BURST (L=~40us, S=~20us)
// Sequence derived from your Saleae measurement list:
sendPulse(42); // Long
sendPulse(40); // Long
sendPulse(16); // Short
sendPulse(38); // Long
sendPulse(20); // Short
sendPulse(39); // Long
sendPulse(46); // Long
sendPulse(33); // Long
sendPulse(44); // Long
sendPulse(35); // Long
sendPulse(25); // Short
sendPulse(44); // Long

digitalWrite(OMEGA_PIN, HIGH); // Ensure it returns high for the idle gap
}
}

void sendPulse(int lowTime) {
digitalWrite(OMEGA_PIN, LOW);
delayMicroseconds(lowTime);
digitalWrite(OMEGA_PIN, HIGH);
delayMicroseconds(15); // Average high-time gap observed
}

 

[Log8]

Spoiler alert: this did not work. I'm grasping at straws at this point. I'm pretty sure chatGPT is like 3 messages away from reaching through the web and just disconnecting my internet. I've tried like 10 variations of this code, none of them work. Not sure what to do at this point.

 

[forcefed86]

Gotta go for the Yard foce 120v mower. THen you can chuck them in your scooters too.

Its a monster.

 

[OlderGiantFan]

2000 lawns later, still starts first pull and runs on the smell of an oily rag. Self-propelled naturally
Some things are better left to gasoline.

 

[Willy_Two_Dogs]

So would it not be possible simply to pull the BMS out of a Greenworks battery and wire it to another pack? Or is that an over simplification? Wire the mower's terminals to the appropriate connections on the Greenworks BMS?

My thoughts are to build an 18S lifepo4 battery...use the Greenworks BMS to not charge it, but rather trick the mower into thinking "all is well". Use a bench PSU to charge the lifepo4 pack.

Thoughts?

 

[OlderGiantFan]

Sounds like a fun project.

 

[Papa]

2000 lawns later, still starts first pull and runs on the smell of an oily rag. Self-propelled naturally
Some things are better left to gasoline.


View attachment 386772

As a factory trained Honda Power Equipment grease monkey mid 90s, this brings back fond memories... and a rather unusual tale about a customer's HR214 walk behind I massaged.

We were an equipment rental biz, but certified Honda dealership. One early spring we offered a tune-up special exclusively for Honda mowers (because I adamantly refused to wrench anything else). Lady brought in a nasty looking HR214 walk-behind... to say 'neglect' would be a gross understatement. The oil was akin to tar, and the blade had no visible cutting edge whatsoever. I did the usual; Oil changed (twice on this example because it was so bad). Carb bowl removed fuel sys flushed and cleaned, spark-plug renewed, valves adjusted and blade replaced. To my amazement, the damn thing started on the 'first pull'... true to Honda's claim to "first pull" fame. It belched a slight, but continuous haze of smoke, but made no unusual noises.

When the 214 owner returned I ask her when was the last time the mower was serviced (particularly, when oil was last changed). Her reply, "We bought that mower over 4 years ago for my son to make money mowing lawns during summers. He loved doing it - he'd leave sometimes at 6 in the morning and not return home until after dinner. "Service?", she continued, the main reason we bought the more expensive Honda was because we just assumed it wouldn't need any servicing. And I could be mistaken, but I don't believe the oil was ever changed, not that I'm aware of. My son would just fill the gas tank and disappear."

 

[rafalg]

In the neverending war between customers and producers i have found some small victories. Battery power tools forcing you to use only proprietary batteries.
But you can get Makita knockoffs from China (with some crazy/strange sounding brand names) that will run on counterfeit Makita batteries. Even genuine Makita tools refuse to work with with fake batteries, but fake tools are just happy about any fake battery that you can shove into the slot.
I'm not saying the knockoff tools are as good as the original, they aren't even close. But work sufficiently well and cost like nothing in comparison.

 

[Willy_Two_Dogs]

My Greenworks batteries were made in 2022...went into service June or July of 2023...one of them was replaced under warranty this week. I don't expect the other five to get me through next mowing season. That said a ~80-100ah lifepo4 17s would have the voltage/amps/drain characteristics that one would need.

Took the bad battery I still have apart...it looks like a wiring scheme from hell. I'm 99% sure wiring it to a lifepo4 pack would not work because of how it's measuring voltage at different groups expecting different voltage, but need to double check. My fear is the pooter on the mower actually expects those measurements rather than a simple signal from the battery saying "Yes, the owner of the mower paid the ransom to operate you."

Did I mention a new battery is $350 each? Having to replace all six after tax is $2300...just so i can mow 4 years. A riding gas mower would cost no more than ~$500 to operate in that same time frame when factoring in gas/oil/filters/belts

Edit: Just looked on greenworks website...they have them on sale for $265 each...how much you want to bet if I order them they would be old batteries they are trying to unload? Lithium ion ages like milk.

 

[marty]

I don't expect the other five to get me through next mowing season.

Suffering from paranoia? There is medication for that. Why not just mow, be happy, and try not to worry about dead batteries.

My Greenworks batteries were made in 2022.

How about starting to panic in 2032? That be 10 years.

$2300

What does a new mower cost?

Lithium ion ages like milk.

Please stop looking at the SELL BUY date. That is the last date milk can be sold by. Good to drink ? weeks after that. Think temperature milk is stored at makes a big difference in how long it lasts. If it don't smell bad? I drink it.

$265 each

Pretty sure that wise battery builders in China are working on counterfeit Greenwork batteries. Check eBay, Amazon for cheap counterfeits. I am suffering from counterfeit battery paranoia. Dying in a fire caused by counterfeit batteries is not how I want to go. I would charge in the same place I store the gasoline.

Is there winter where you at? 6 - 8 months of battery storage? Some lithium batteries do a suicide during storage. Look at owners manual for storage and charging instructions. I leave my electric riding mower plugged in, charger, in a unheated attached garage for the winter.

pooter on the mower

What is a pooter?