FYI: you can currently get a 30000mAh 65w Baseus power bank for £35 on : r/SteamDeck

Baseus Portable Charger, 30,000mAh Power Bank 65W Battery Pack, Smart Digital Display, 7-Port for Laptop, MacBook, iPad, iPhone 15/14/13 Series, Steam Deck, ROG Ally, Samsung (Black) : Cell Phones & Accessories

【65W PD Fast Charge】Recommended by the well-known media Polygon as a portable battery for ASUS ROG ALLY. 65W USB-C port provides enough power to

Baseus Portable Charger, 30,000mAh Power Bank 65W Battery Pack, Smart Digital Display, 7-Port for Laptop, MacBook, iPad, iPhone 15/14/13 Series, Steam

Baseus Power Bank 65W 20000mAh 40% Off – Steam Deck Life

Baseus Amblight Power Bank 65W 30000mAh

Powerbank not giving 30W turbo : r/ROGAlly

A Comprehensive Guide to the Best Steam Deck Power Bank

Baseus 65W Power Bank 30000mAh PD Quick Charging Powerbank Portable External fast Charger For phone Tablet For Xiaomi - AliExpress

Baseus 65w Pd Power Bank 30000mah Baseus Power Bank 20000mah 65w - Baseus 65w Power - Aliexpress

WARNING: DO NOT BUY THIS PORTABLE BATTERY FOR THE ROG ALLY : r/ROGAlly

For anyone who is looking for a smaller power bank, Baseus 30W 10000mah works fine and fits on case bottom compartment : r/SteamDeck

Baseus 65W 20000mAh Laptop Portable Power Bank (Best Steam Deck Battery?!)

⚡【65W PD Fast Charge】65W PD USB-C port provides enough power to charge a laptop at full speed. This power bank charge a MacBook pro 13” from 0% to 50%

65W Power Bank Compatible with Steam Deck/ROG Ally/Legion Go, Laptop Power Bank 20000mAh Fast Charging Battery Pack for MacBook, Dell, Lenovo, Asus

65W Power Bank Compatible with Steam Deck/ROG Ally/Legion Go, Laptop Power Bank 20000mAh Fast Charging Battery Pack for MacBook, Dell, Lenovo, Asus : Cell Phones & Accessories

【140W Highly-Powerful Charging】Adaman 140W portable charger uses the latest Power Delivery 3.1 (PD 3.1) technology to provide a 140W super-fast

Baseus 140W Portable Charger, 24000mAh Laptop Power Bank, 3-Port Fast Charging USB C Battery Pack, 2 USB-C+1 USB-A, Smart Digital Display Battery Bank