Smart Phones really are smart

[peter912]

So I plugged in the charger to my cell phone and later went back to check on its status . I got a surprise, a message appeared on the phone, that this was not its charger and that I should use its charger to charge quicker. How did this phone know that I was using my old cell phones charger and not its charger ? I didn't think it mattered but apparently the cell phone is smarter than me, lol .

 

[Darren]

It can detect what amperage it's pushing from the charger. Newer phones you want at the minimum 1A, preferably 2.1 as that's what Quick Charging is rated at last I saw. What's really weird is when equal spec power bricks from different companies (LG and Samsung) won't charge the other brands phones as fast despite being identical amperage.

 

[beers]

As above probably lack of amperage/wattage. There's a couple different versions of the qualcomm quick charge as well that negotiate higher charging rates.