I occasionally get a warning or 2 when charging, but its very random and it goes away when you try charging again. No issue charging at HV @15amps

Hi,
I have the problem that my M8D is neither recognised on the PC nor on the laptop. So I can't do a firmware update. Does anyone have a tip for me how I can fix this?

^^ Had a similar issue. Above was my fix. ^^

OK, thanks, I'll give it a try. My neighbor's MacBook didn't recognize the charger either..., that really annoys me, even though I think the charger is really good...
Especially since V3.07 has been available since today...

Not it! I'll let someone else see what new annoyances they've added this go around.

I find that the charger is very picky at what port it communicates with. It needs a USB A port with USB 3 speeds, and an USB A to Type C cable in order for it to the recognized by the computer. Ive successfully connected to my charger with a Type C port, using a Type C to USB A adapter, and an USB A to C cable. I know its stupid, but seems like its the only way it would work.

They usually post about new firmware available and the change log on facebook but they didnt post anything about the M8D this time.

Edit: Decided to download it and see if they included the change log within the package, sure enough they did

===M8D V3.07===2025.03.03===
1. Fixed the warning of overcurrent when the current reaches more than 20A when the dual channels are charged at the same time
2. Fix the voltage drift of more than 20A when the output is in dual-channel simultaneous power supply mode.
3. Modify the start voltage of balancing, default -100mV to the always.

yeah my MacBook didn’t recognize it either. If you’re technically inclined you can try a Ubuntu live boot usb stick. Mine is a full install, so I’m not sure if it’ll pick up the charger as an external drive or not. Worth a shot if you don’t want to bother with a full install, especially if you aren’t a computer person.

Anyone looked into or tried the resistor bank discharge function on V3.06 firmware? I was watching their Youtube video and reading through the update manual with the resistor bank discharge function and it combines the internal discharge power and the external resistor bank to give you extra discharging power. To my understanding, since the internal discharge function on the charger is capped at 10A, does this mean for a 2s pack, Im ONLY adding an extra ~50W discharge power? No matter how powerful my external discharger bank is? If so, then this doesnt seem its worth the hassle to setup a resistor bank just for an extra 50W for 2s. Maybe worth it for people with 8s packs.

So, nothing has worked so far. I also tried it with a Linux Ubuntu system on a USB stick, but it wasn't recognized either. I tried different cables, computers and USB ports. I even tried a Y USB cable where the power is taken from 2 USB ports, but nothing happens.

Like i said before, you need a usb 3.0 type A port. It doesnt work if the usb is a legacy 2.0 port,

If you dont have any usb 3.0 ports, then you can use a type C port, but you must use type C to usb A adaptor first, then a type A to type c cable to the charger. It doesnt work if you connect your charger with a type C to type C cable.

I doubt that, all USB chips are basically backwards compatible. What is a main difference is the max supplied current through the port. USB3 can handle more than USB2

Doubt all you want, its what actually worked, for me at least. No harm trying

Just asking for a "friend" What are the possibilities to a Bluetooth connection on this charger?

So that what was working for you is per definition the issue?