Outside Solar Light

Existing solar panel, plugged into nothing.

3xAAA LED light on way from Ali

One of these: 3.7V 4.2V Charger 5V 6V 9V 12V Discharger Board DC DC Converter Boost Module For Diy Solar Mobile Power Chargewer 18650 lithium - AliExpress

needs a 18650, housing etc, probably behind the panel, light will need 'adjustment' to make it work, need to check 3xAAA voltage (suspect 4.5 - 5 expected) to get the right board