Since I have a somewhat cautious attitude about such things, I don’t expect an OSHA warning label on a hammer telling me not to hit my head with it.

OF COURSE, DON’T PLUG A CHARGER INTO ANOTHER CHARGER! They’re chargers! Not push-me-pull-yous from a Dr Dolittle movie.

Just to be “safe” label your charging cable as that and only connect the type c charger to the device it was intended to charge. Also, resist the urge to plug from a charger to some sort of box that can support several connectors, such as a hub unless you are sure you won’t be delivering power (charging?) something else by mistake.

It appears that the Nexus 6P and the Nexus 5X OEM chargers do not have a sense line to guarantee that they are plugged into their intended chargeable devices before allowing the charger to try to charge. These would be not in compliance with established USB rules.

As a note: you can plug different combinations of Nexus 6p and Nexus 5x together and (depending on combination) charge the other. Y

The Google type c charger, sold on the website is properly designed to verify that it is plugged into the right thing before it will deliver power.

So, how big of deal is this? (Pay attention to the first sentence.) For some, it is better to only use type c chargers that have been tested to use this sense line, like the Google type c charger on the Google website.

Here, I’ve only talked about chargers, not type c cables. I’m sure more will come in the future, when people get more fast data USB c ports. For now stick with cables you can buy from Amazon as they are tested to comply with known USB standards. Eventually you may be glad you have labeled each cable you get as to it’s compliance standards, as they “all look the same”.