CUKTECH 30 300W 40000mAh Power Bank

Overview

The CUKTECH 30 is a high-capacity 40,000mAh power bank delivering up to 300W of combined output across two USB-C ports (including a 140W PD 3.1 port), two USB-A ports and a 20W Qi wireless pad, letting you charge up to five devices at once. Part of the Xiaomi ecosystem, it uses eight EV-grade Samsung 21700 cells for a 144Wh (4S1P, 141Wh rated) pack and supports PD 3.1, PPS, SCP, FCP, AFC and QC 3.0/5.0 protocols. A unique Hub mode turns it into a USB pass-through for peripherals, an intelligent PWM fan manages heat at high loads, and the dual-way 140W input refills the tank from empty in about 2.5 hours.

✨ Key Highlights

• 300W total output across a 2x USB-C, 2x USB-A and 20W Qi wireless charging combo — enough to run a MacBook Pro, iPad, iPhone and wearables simultaneously, with the dual-way 140W port handling a 16-inch MacBook Pro at full charge speed via PD 3.1
• 40,000mAh / 144Wh massive capacity built from eight EV-grade Samsung 21700 battery cells (4S1P pack) rated at 141Wh, delivering up to 7 full iPhone 15 charges or a complete MacBook Pro charge
• Dual-way 140W flash charging recharges the bank itself from empty to full in about 2.5 hours when paired with a 140W PD 3.1 wall charger — that same USB-C port outputs 28V/5A to laptops
• Doubles as a USB hub: in Hub mode it connects to a laptop or desktop via USB-C and routes the USB-A ports to peripherals (mouse, hard drives) over a USB 2.0 connection at up to 480 Mbps
• TFT display shows real-time battery percentage, input/output wattage and charge status, with an intelligent PWM cooling fan that dynamically adjusts to keep the 300W load thermally stable