GTrusted

Portable power adapters like the Ventev Wallport pd1300 Wall Charger can be used to charge most USB Type-C devices supporting USB Power Delivery. To see how well this external charger performs with the Apple 10.5-inch iPad Pro, we look at the USB Power Delivery negotiations through the GRL-USB-PD-A1 app from Granite River Labs.

Using a Apple USB-C to Lightning Cable, we first connect the Ventev Wallport pd1300 Wall Charger to the 10.5-inch iPad Pro with 2% battery charge remaining. Over USB Power Delivery, we can see that the Ventev charger starts to advertise its source capabilities of 15 watts (5 volts @ 3 amps), 27 watts (9 volts @ 3 amps), 45 watts (15 volts @ 3 amps), and 45 watts (20 volts @ 2.25 amps) after a hard reset.

Initially the 10.5-inch iPad Pro can be seen to request 15 watts (5 volts @ 3 amps) from the Ventev charger which it then accepts.

However after exchanging Vendor Defined Messages, the Ventev Wallport pd1300 Wall Charger oddly declares only 15 watts (5 volts @ 3 amps) and 45 watts (15 volts @ 3 amps) out of the four power profiles as earlier advertised.

The 10.5-inch iPad Pro still goes on to request and establish the same initial 15 watts (5 volts @ 3 amps) from the Ventev charger.

Later we can see that the 10.5-inch iPad Pro calls 45 watts (15 volts @ 3 amps) of charging power which the Ventev charger also accepts.

From the power graph, we observe that the 10.5-inch iPad Pro is not pulling any current from the Ventev charger after the first 10 seconds of initial plugin from a 2% dead battery. The 10.5-inch iPad Pro unfortunately is not able to charge with the Ventev Wallport pd1300 Wall Charger over USB Power Delivery.