I finished my Portable UPS Battery Option - thought I share in case anyone needed a solution in a bag. You can power it and charge at the same time, Battery backup on my solution held steady for 28hrs powering the router and phone.
Parts:
Battery & UPS - https://www.amazon.com/dp/B07YRZYLKV?psc=1&ref=ppx_yo2_dt_b_product_details
Antennas Cellular - https://www.amazon.com/Taoglas-Cellular-GLONASS-Monopole-Antenna/dp/B01M25VGRQ/
WIFI Antenna - https://www.amazon.com/Omnidirectional-Bluetooth-Directional-Lightweight-Waterproof/dp/B08X45Q44Z/
Cellular SMA extension cable - https://www.amazon.com/Bingfu-Bulkhead-Cellular-Amplifier-Transmitter/dp/B07MJQWH8S/
WIFI SMA Extension Cable (if needed) - https://www.amazon.com/Bingfu-Bulkhead-Antenna-Extension-Wireless/dp/B07MT3VZXZ/
Case - https://www.harborfreight.com/2800-weatherproof-protective-case-medium-black-63926.html