Anker 737 Power Bank (PowerCore 24K) — 24,000mAh

The Anker 737 Power Bank, also sold as the PowerCore 24K, is a high-capacity portable charger with 24,000 milliamp-hours of storage and a rated energy of 86.4 watt-hours, which sits under the 100 watt-hour limit for carry-on air travel.

It delivers up to 140 watts of total output through two USB-C ports and one USB-A port, using USB Power Delivery 3.1 with two-way charging — the bank itself recharges at up to 140 watts through USB-C as well as delivering it. A smart digital display shows output power per port and estimated time to full recharge. Anker includes a 140-watt USB-C to USB-C cable.

The bank weighs 630 grams and measures 155.7 by 54.6 by 49.5 millimeters. Anker provides a 24-month manufacturer warranty.

E-bike compatibility: it recharges from any USB-C PD source and then runs phones, headlamps, lanterns, and USB-C laptops for days at camp. It is the bridge device between a wall outlet, a solar panel with USB-C output, and everything else in the kit.