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I know that when you use a Macbook while it's plugged in at 100%, it uses the power from the charger and bypasses the battery. Does the same apply to the iPad Pro? Or does it get still use the battery while plugged in and continuously recharge it?
Power will be drawn entirely from the Power Adapter as long as the overall CPU demand is less than the available output from the Power Adapter.
As such, if the Power Adapter output is less than demand, power will be drawn from both power sources. In simple terms, assuming that the iPad battery is fully charged, if the Power Adapter is capable of 12W - and the running load is 12W - the iPad battery will not discharge.
If instead the Power Adapter is capable of 10W, but the running load is 12W, the battery will supply the remaining 2W and slowly discharge.
When using the OEM Power Adapter supplied with an iPad, the Power Adapter is generally sufficiently rated to provide sufficient power for the iPad with maximum screen brightness and max’ CPU load - and still be able to charge the iPad battery at a reduced rate. In such situations, thermal management will likely reduce the charging rate anyway - so the reduced charging rate due to potentially limited external supply is likely to be irrelevant.
Charging characteristics become more significant when the iPad is being powered via the USB port of a computer - as many computer USB ports may be limited to 0.5-1.A @5V (i.e., 2.5-5.0W) - and in such circumstances the power demand of the ipad will be shared between available power from the computer - and the iPad battery.
Power will be drawn entirely from the Power Adapter as long as the overall CPU demand is less than the available output from the Power Adapter.
As such, if the Power Adapter output is less than demand, power will be drawn from both power sources. In simple terms, assuming that the iPad battery is fully charged, if the Power Adapter is capable of 12W - and the running load is 12W - the iPad battery will not discharge.
If instead the Power Adapter is capable of 10W, but the running load is 12W, the battery will supply the remaining 2W and slowly discharge.
When using the OEM Power Adapter supplied with an iPad, the Power Adapter is generally sufficiently rated to provide sufficient power for the iPad with maximum screen brightness and max’ CPU load - and still be able to charge the iPad battery at a reduced rate. In such situations, thermal management will likely reduce the charging rate anyway - so the reduced charging rate due to potentially limited external supply is likely to be irrelevant.
Charging characteristics become more significant when the iPad is being powered via the USB port of a computer - as many computer USB ports may be limited to 0.5-1.A @5V (i.e., 2.5-5.0W) - and in such circumstances the power demand of the ipad will be shared between available power from the computer - and the iPad battery.
Your iPad will recharge its battery while it is connected to a suitably powerful Power Adapter. If the Power Adapter cannot provide sufficient power for current demand, load will be shared with the battery.
Most models of iPad require a Power Adapter rated at 12W or greater to reliably charge. 5W Power Adapters intended for older models of iPhone are inadequate to charge an iPad; if the iPad charges at all, charging will be very slow. A 20W Power Adapter should be sufficient to fully power most models of iPad - and simultaneously charge the battery.
I understand the charging logistics, but will the electricity running the current processes on the iPad originate from the AC source or the battery?
Example: If my iPad Pro is plugged into a 45W charger at 100% battery , and I am currently watching a movie. Will the iPad continuously draw power from the adapter to power me watching the move, or will the iPad's battery power the movie and the adapter just charge the battery.
Adapter------> CPU or Adapter------>Battery-------> CPU
I know the Macbook can do the first option mentioned above, and I was curious if the iPad can as well.
Thank you! This is perfect.
Does the iPad Pro use power from the AC source or the battery while plugged in?
