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Hand Crank Flashlight From ...View Instructable »
Circuit Board Design Class
3D Printing With Circuits Class
Thank you for the comment! I used the saw just because the enclosure of my power bank was a unique piece of plastic and so i hadn't any other way to open it. But you are right, maybe other power banks can be opened with a small screw driver and a bit of patience. I know I have demaged the enclosure but I will rebuilt it in another project. 3.7V is the nominal voltage of a Li-ion battery but it can goes from 3 to 4.2V.
How to Fix a Power Bank's B...View Instructable »
3.5V Solar Panel AA Battery...View Instructable »
Mini Traceur Arduino - Mini CNC Plotter