I tried using the portable power supply 'Anker PowerHouse II 800' that can output up to 11 units at the same time with a battery capacity of 216,000 mAh - GIGAZINE
Anker Powerconf C200 2k Usb Webcam For Laptop Computer Mini Camera Ai-noise Cancelling Stereo Microphones Low-light Correction - Webcams - AliExpress
Amazonブラックフライデー】USB-C端子が少ないノートPCで使うべきAnker製ドッキングステーション4選 | Business Insider Japan
Anker Nano II 65W black A2663N11 [1 port/USB Power Delivery-adaptive /GaN (gallium nitride) adoption] anchor Japan | Anker Japan mail order | BicCamera. com
Buy Anker PowerConf S330 USB Speakerphone, Conference Microphone for Home Office, Smart Voice Enhancement, Plug and Play, 360° Voice Coverage via 4 Microphones, and Powerful Sound Online in Japan. B09FJ7LWX4