suunto vertical charge 33w

gerasimos

can i charge vertical in 33w xiaomi fast charger (output 3A) or i will cause problems in watch?
I have to be careful about chargers with the right specifications in general?

thanks a lot!

Egika

@gerasimos the current rating does not really matter.
I guess with 33W at 3A this one has a voltage output of 11V?
Then it should not be used to charge any other USB device than a matching Xiaomi phone.

gerasimos

@Egika this is spec

Product name
Mi 33W Wall Charger (Type-A + Type-C)
Input
90~264Vac ~ 47/63Hz, 1.1A
Output port
USB-C + USB-A
Output
USB-C : 5V/3A, 9V/3A, 11V/3A, 12V/2.5A, 15V/2A，20V/1.65A，33W MAX
USB-A : 5V/3A, 9V/3A, 12V/2.25A，27W MAX
Dimensions
83.7mm x 48mm x 28mm

Egika

@gerasimos yeah. could work on the USB-A output. If the output voltage is kept at 5VDC until the connected device starts asking for more.
I guess noone here will take liability for this to work well.

gerasimos

@Egika THANKS FOR HELP MAN!
just for generall info asking , and correct use of charger because i read the manual and i dnt find something for speicific specific charging specigfications

far-blue

The power supplied by a usb charger is always controlled by the receiving device so it should be fine. When you plug in a device the charger will start with (I think) 5v 150mA and then the device and charger have a conversation about what the device wants and what the charger can provide.

Egika

@far-blue this is true for computer and notebooks USB plugs.
For simple chargers, most of them are just 5VDC sources without any intelligence.

far-blue

@Egika Unless a device follows at least the specification for usb 1.0 (which includes power negotiation for up to 500mA @ 5v) it isn’t allowed to use the USB logo or branding. A chip to handle the spec costs no more than a few pence these days so it’s highly unlikely you’ll buy a charger carrying the usb branding that doesn’t follow the spec.

You could pretty easily test whether a charger does actually do the handshake by sticking a little tape over the 2 middle pins of the USB-A plug or socket as these are the D+ and D- data pins needed for the handshake. If your device doesn’t start charging or takes days to charge you can, I think, conclude it’s only receiving the default 150mA.