Dusk to dawn switch...

[Externet]

Hello all. First time here.

Does anyone know what board/circuit is used in these night lights, and if it is available to purchase somewhere ?
Has anyone opened and inspected one ?
It uses the solar panel as light sensor and manages charging the lithium cell. No motion sensing.

----> https://www.aliexpress.com/item/15-LED-Solar-Light-Waterproof-IP65-18650-Lithium-Battery-White-light-Solar-Powered-Outdoor-Fence/32811489795.html

or, any similar using lithium cell ?