Battery drain of iPad with wired connection (USB-C to Lightning)


#1

Wondering if anyone else has experienced significant drain of the iPad battery when using a wired connection? Wired from my MBP 13” with USB-C to lightning - so the iPad (12.9 inch pro) should be charging / holding steady rather than draining down to empty. However, I’ve noticed this occurring more than once, but not consistently. My MBP is plugged into a wall charger as well.


#2

Is the iPad battery showing as charging? It’s possible that the iPad is charging the MacBook as well. (Or just not charging)

I believe the device that gets plugged in first is the one that gets charged.


#3

My iPad Pro isn’t the USB-C Gen 3 version - it’s the lightning model, Gen 2. So, i think as long as it is connected to a MBP or another power source it should always start charging from it. It was showing as charging but it might have switched off at some point and I didn’t notice or the charge amount it was taking was less than what it was using.


#4

That iPad has the ability to quick charge, which is needed to charge the iPad while doing something processor intensive and also with the screen brightness up. I have both that gen and the new usb c one. Yours is able to draw close to 30 watts, which I think is double of what the MacBook pro ports can supply. When I tested the new usb-c iPads, the draw is like 38 watts, which is great for quick charging, but hopeless if you want to charge from a MacBook port while it’s on.