DIY Solar Power Bank from Old Laptop Battery

Learn- How to make a Solar power operated USB power bank at home. i used a old laptop battery for this project and two module which is 5v charging module and power booster.
inside of laptop battery i got 6 individual cell (Samsung 18650) and each cell has 3.7 volt 2600mah power but i used only 4 cell.

Required Material-
1. 5Volt Charging Module
2. Power Boost Module(5v, 1amp)
3. Small solar panel
4. Old Laptop Battery
5. On-Off Switch
6. Box.

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