Charging a 2020 MacBook Air 13" Retina with Battery Packs

MacBook Air connected to Anker

Using the same setup as I did with the early 2015 MacBook, I did a quick instrumented test of the Anker PowerCore Fusion 10000 and the Zendure X5, this time hooked up to a 2020 MacBook Air 13" Retina Core i5. This laptop is firmly in the era of full PD support, and the negotiated power profiles support this:

Battery Pack	Voltage	Amps	Watts	Charging with
Anker	9.04V	2.11A	19.07W	4.55W-8.37W
Zendure	20.01V	1.4A	28W	14.82W

The Zendure is supposed to provide 45W but the MacBook’s factory charger is a 30W unit and the power profile it supplies looks a lot like the 20V 1.4A I’m seeing here. The Anker only advertises 20W and I suspect the 19W I’m seeing here is just the closest PDO the two devices can negotiate.

In either case, both packs will charge the laptop, which has a 3933 mAh battery (original capacity 4381 mAh, but it’s 2+ years old (only 25 cycles though), and has degraded to about 90% of its capacity when new.

I’ll do a capacity test soon...