Zumo User Forums

In my experience, even though there are probably very few negative experiences shared here.
Both the zumo XT2 and the Tread 2 charge very well with “standard” USB C connections.
The power supply should deliver 5 volts and 2 amps and must also recognize that the device requires 5 volts and 2 amps, that's it, no more and no less.

For this reason, the zumo XT2 will most likely have no problem with chargers that can deliver higher power outputs, such as 60 watts or 80 watts. It is more likely that the charger will not do what it is supposed to do, although this is “rather rare.”

However, I could well imagine that the OnePlus 80W charger is designed more for OnePlus and probably “only” refuses to supply 5 volts and 2 amps.

In any case, almost every power supply works for me.
PC, notebook, power banks, power supplies from 15 to 65 watts tested. All of them supply the zumo XT2 perfectly, never problems at all!

The cable may still be problematic also.
It must be reliably designed for at least 10 watts and also support at least the 5 volts and 2 amps requested by the zumo XT2.
But here, too, my “standard” USB C cables can all do that.

A tip for everyone who can't part with anything: finally sort out your cables and chargers.
Two or three decent cables and two or three decent chargers or power banks, and you'll probably have fewer worries than before.

Also for PCs, use good, usable USB C connections (both output and cable).
Here is a tip from another forum:

"... With PCs, a USB C hub can sometimes work wonders ...

.



Last but not least, regarding updates via Wi-Fi or Garmin Express.

I have also had better experiences with Garmin Express.
However, there were one or two situations where the update via Wi-Fi worked better directly on the device, but unfortunately I have forgotten when that happened.



PS
If you have problems with the 256 GB micro SD, note the differences in formatting between Fat32 vs exFAT vs NTFS vs ... and that (older) Windows versions, among others, do not format more than 32 GB for the appropriate format, at least not with their own on-board tools (but if they do, it's not a big challenge in the end).

proofresistant wrote: Sat Jan 31, 2026 12:33 am In my experience, even though there are probably very few negative experiences shared here.
Both the zumo XT2 and the Tread 2 charge very well with “standard” USB C connections.
The power supply should deliver 5 volts and 2 amps and must also recognize that the device requires 5 volts and 2 amps, that's it, no more and no less.

For this reason, the zumo XT2 will most likely have no problem with chargers that can deliver higher power outputs, such as 60 watts or 80 watts. It is more likely that the charger will not do what it is supposed to do, although this is “rather rare.”
...

I have the opposite experience, with a 5V-1A charger and a thin cable the XT2 refuses to charge.

Francis wrote: Wed Feb 04, 2026 10:54 am

proofresistant wrote: Sat Jan 31, 2026 12:33 am In my experience, even though there are probably very few negative experiences shared here.
Both the zumo XT2 and the Tread 2 charge very well with “standard” USB C connections.
The power supply should deliver 5 volts and 2 amps and must also recognize that the device requires 5 volts and 2 amps, that's it, no more and no less.

For this reason, the zumo XT2 will most likely have no problem with chargers that can deliver higher power outputs, such as 60 watts or 80 watts. It is more likely that the charger will not do what it is supposed to do, although this is “rather rare.”
...

I have the opposite experience, with a 5V-1A charger and a thin cable the XT2 refuses to charge.

Hello @Francis,

Your experience confirms exactly what I wrote

A 5V-1A charger is definitely too weak. 1 ampere is at least about 1 ampere too weak.
The zumo XT 2 needs at least 2 amps (as I have observed in real life, at least 8 watts).
That's why it's best to use a power supply that supports 15 watts or more

Then a “thin” cable, whatever that means technically,
may not be the “best” choice either.


PS
Then don't forget that 5V-1A is significantly less than the USB C standard defines. Please also note that the shape of the connector says nothing about the USB C functionality.
There are devices on the market with USB C connectors that “only” support USB A (some cell phones with low data rates, for example).

I have 2 usb A - usb-C cables, one does charge and the other does not.

vigo wrote: Sat Feb 07, 2026 6:33 pm I have 2 usb A - usb-C cables, one does charge and the other does not.

Good that at least one cable works for you

This confirms what I already above wrote also :

"... The cable may still be problematic also. ..."

Unfortunately, not everything that looks like USB C is the same.
I'm sticking to my plan of sorting out my old cables step by step.