TomTom power need

Use the cable supplied. The Tomtom will charge up fine. The rate of charge will be a function of how much current your car charger provides.

If you identify the part number of the device, perhaps someone can check whether it follows any particular charging standard.

Paul

Use a USB C to USB C and put something like

As both my mobile phone and laptop manufactures recommend limiting charging to 80% to prolong battery life probably this is a good idea. On my phone the facility is inbuilt and on my laptop it is achieved with some additional software, however does your new tom tom actually implement this policy as an option?

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Thanks to all who replied. I'm going to follow the advice to use the supplied cable as the 'line of least resistance' :-)

AIUI part of the USB standard is to allow the devices to negotiate a higher voltage and/or current, but in the absence of this they use 5V.

But I'm not an expert...

Andy

Not sure *which * USB standard does that., C certainly.

C is just a connector standard, the voltage standard is USB Power Delivery. USB-PD works over A and B connectors too - PDv1 had a voltage negotiation on USB-A/B based on pulsing Vbus. PDv2 and later are what is used today for voltage negotiation on the USB-C connector.

Theo

Ah. OK then

Not every piece of silicon ends up with USBPD though.

The SOC for the TomTom, could be an old-fashioned precision charger using less than 1 amp at 5V. My Bluetooth speakers are like that. It's a brick sized speaker with two emitters, and is somehow considered "Stereo". A huge separation of 4 inches between emitters really gives that stereo effect :-) It charges at less than an amp and it takes a while.

I bought two of them, assuming each was mono or something. Oops.

Paul