Mini PowerBank

A small power bank of the elements at the link below and a lithium battery 1800 a / h.
https://www.aliexpress.com/item/0-9V-5V-600MA-USB-Output-charger-Mini-DC-DC-Boost-Converter-1a-lithium-battery-charging/32477591222.html?spm=a2g0v.10010108.1000001.7.41586b24xcuG6K
Lithium polymer battery of this type: https://www.aliexpress.com/item/1-2-4Pcs-103450-3-7V-2000MAH-lipo-polymer-lithium-rechargeable-battery-for-MP3-GPS-navigator/32902182206.html?spm=a2g0s.8937460.0.0.1c772e0eyTf78d