30,000 mAh Power Bank

30,000 mAh power bank — big capacity for travel and laptops

30,000 mAh strikes a balance between capacity and portability — it charges a flagship smartphone 5–6 times, a tablet 1–2 times or a USB-C PD laptop (e.g. MacBook Air) from 0 to roughly 70 %. It weighs 500–700 g, so it fits in a backpack but not in a pocket.

For laptops — look for PD 65 W

Not every 30,000 mAh power bank can charge a laptop — you need a USB-C port with Power Delivery 65 W or higher. The Baseus model with an LED display is a popular pick in this category. Standard models with PD 20 W will only charge a phone — faster, but not a laptop.

On a plane — check the label

30,000 mAh equals approx. 111 Wh at 3.7 V — this exceeds the 100 Wh limit and requires airline approval before the flight. Not every carrier grants approval — check the airline's policy. A hassle-free option for flying is the 20,000 mAh (approx. 74 Wh).

Smaller: 20,000 mAh, 10,000 mAh. Larger: 50,000 mAh (not for planes). Magnetic: MagSafe.