Will this charger charge our device st 45w?
I got one and it seems to work. Usually original would show about 60 minutes to completely charge where this one charges in 44 minutes.
This is at 48%.
When started I've had phone to 20% and has charged up to 60% within 20 minutes or so. So it seems to be but don't know how to exactly check or likely don't have the tools to see if it is going at 45w or less.
But this has worked for me quite well. As rather have multiple when traveling.
The above statement isn't entirely accurate.
In basic DC electrical circuits the following formula applies:
P = V x I where:
P = Power of the circuit
V = Voltage applied to the circuit
I = Amount of current flowing in the circuit
Following this formula, this power supply can deliver 45 w at the 15 volt and 20 volt levels.
More importantly though is the fact that this power supply is of PPS variant. Meaning that it can listen to and adjust the voltage and current to the device it is charging, provided a specific cable is also used. (I will provide a link below).
So how does this new charging standard for cell phones work?
When the phone is first connected, it checks that the cable and power are capable of PPS type charging. If they aren't, it will charge the older way of just accepting a constant voltage to charge.
If it is the proper "faster" charging PPS type, then it looks at the current battery charge level and then "instructs" the power supply to provide a certain voltage level. The closer the current battery charge is to 0, the higher the voltage it will tell the power supply to deliver. So, if the battery is near 0, it will ask up to 20 volts from the power supply. So, at 20 volts and at a maximum of 3 Amps, that is how this power supply can provide 60 watts. (See above formula). Our phone can only accept 2.25 Amps at 20 volts, hence 45 Watt charging.
So, the closer the battery level was closer to 0, the fast this charger will charge..... for a time.
Once the battery gets closer to a full charge or the battery temperature is too high. Yes they monitor battery temp, this came out of the Note 7 debacle. It will tell the power supply to reduce the voltage, hence reducing the power (wattage) level to the battery and slowing the charging rate. This typically happens between 70-80% of full charge.
Sorry if this was sooo long.
This is the US version of the above power supply.
This is the required cable to go with it.
Anker Powerline II USB C to USB C 2.0 Cable (6ft) USB-IF Certified, Power Delivery PD Charging Cable
Remember all of this just happens when connected to the USB-C port of the charger. The other ports do not support the new charging standard.
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