Though I’m now bikepacking with solar, to be SURE I’ve got enough juice to get my devices through a weekend hike I’ve also purchased the Anker PowerCore+ 26800 PD with 30W.
This is the largest portable battery currently allowed for airline carry-on baggage.
26800mAh of power charges most phones over 7 times, tablets at least 2 times or notebooks at least once.
There are two parts: battery and USB-C wall charger.
Charging devices from a wall socket (including the battery) is claimed to be up to 3x faster.
On longer cycling trips when I’m carrying a laptop, this unit IS powerful enough to recharge a MacBook Pro. That will help me keep up-to-date with photos, video and trip reports.