If you're interested in DIY charging board flashlights, take a look at this article.
To DIY a small flashlight power bank, you'll need the following: a power bank mainboard, USB-A, USB-C, and USB-MICRO connectors, an IP5306 main controller that supports 2.1A charging, 2.4A discharging, wireless charging, and solar charging. The back of the board features 9 high-brightness LEDs. Once you have these, you're all set to create your mini flashlight.
The red circle marks the solar panel connector, while the orange circle highlights the wireless charging coil connector.
The back features 9 high-brightness LEDs.
Here's how it lights up a small fish tank.
That's it!