Zumo User Forums

No not on the bike, sitting on my desk at home .

Thats fine!

One final note, because Garmin did not describe this clearly - the Zumo XT will NOT(!) charge, when it is completely off, only when on or in standby!

I have a wall mounted helmet holder and I hang my MC jackets there too, thinking about setting up a powered mount on that wall for the Garmin. Keeps everything in one place that way.

Rofor, do you happen to know what amps are needed to charge up the XT battery?
The Garmin site only says that the motorcycle mount outputs 1.5 amps, is that enough to charge up the battery?

In my experience, 2 amp output via USB is needed to keep the XT charged while it is navigating. Perhaps the 1.5 stated by Garmin is adequate but when looking at USB AC adapters and USB connections in my cars, 2 amp is what I look for. I know for certain that the XT powered mount provides enough to simultaneously navigate and charge. I've often ridden 8 hours and the XT is fully charged when I remove it from the bike at days end.

twowheelstom wrote: ↑Sat Nov 23, 2024 2:40 pm Rofor, do you happen to know what amps are needed to charge up the XT battery?
The Garmin site only says that the motorcycle mount outputs 1.5 amps, is that enough to charge up the battery?

I reckon that you need about 2 amps so that the XT says it's charging, I use this sort of mains charger to see what the unit is drawing.

https://www.ebay.co.uk/itm/156155354050

My XT2 says that it's not charging on a low powered laptop output, but looking at the diagnostic pages, it actually is.

It sounds like you have chopped the lead short so that it doesn't have the black box in it. It is the only way that I can explain why you have 12v at the pin in the cradle.

Let me explain - because there is a lot of duff information flying around - I have the XT1 and XT2 and I have looked at the differences and how Garmin have made the XT2 to be backwards compatible with the XT1 cradle.

The XT1 will not fit in an XT2 cradle.
The XT2 will fit perfectly into an XT1 cradle. It is held securely and will be powered and charged by the 5v pin.


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Zumo XT1

The XT1 has 5 contacts which receive power from 2 pins.

If the contacts / pin locations are numbered from the bottom 1,2,3,4,5 :
Pin 1 is 0v, pin 3 is 5v
5v is provided from the 12v bike battery through a small black cuboid 'box' which is built into the power cable.
Box is labelled Input 10-30V Max 1.5A / Output 4.8-5.5V 1.5A PN 320-01404-00
The cable has about 50cm of red/black twin 12v cable before the box and >1m of 5v black cable between the box and the cradle.


Zumo XT2

The XT2 has 6 contacts and has 2 pins in the cradle.
Pin 1 is 0v. Pin 6, top, is 12v.
If the XT2 is put into an XT1 cradle, there is no pin 6 to provide 12v power.
It uses the 5v power from pin 3.

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If using an XT1 on the bike, the power lead must be providing 5v, not 12v, on pin3. If you have chopped the lead short so the black box is no longer part of it - which seems likely since you have 12v at the cradle - it needs to be put back. I guess the XT1 has a safety circuit which cuts out dangerous voltages.

I have had my XT2 in an XT1 cradle for the past month at my desk, powered by an XT1 lead from a 4A 12v mains transformer. So it is receiving the stepped down 5v voltage. I have not come across any issues with this arrangement and I have been using it a lot.