DIY Power Bank Mod: 18650 & QC Integration

Revitalize an antiquated multi-output power bank through a seamless, no-welding-required enclosure accommodating 6 18650 batteries.

The aesthetics are commendable, with a user-friendly top cover facilitating battery replacement.

Detailed specifications are as follows:

Convert the battery compartment from parallel to series.

Incorporate 6 series protection boards.

Integrate a QC module for enhanced functionality.

Precisely position components within the enclosure, ensuring a snug fit. The QC bait board is strategically placed on the right.

During PCB layout, remember to mirror the design for accuracy.

Employ meticulous soldering techniques, emphasizing the need for manual mirroring.

Prepare the housing by using a precision hot knife to create openings in the plastic shell. Subsequently, secure the holes with AB glue.

Accommodate a voltmeter by crafting appropriate openings.

Affix the QC module securely, complemented by the addition of an output switch.

Upon completion of top cover modifications, connect the wiring and seal the unit. The default output is set at 5V.

Achieve a controlled output of 10V, considering the 0.2V increments of the QC module. The practical output is measured at 9.9V, with the maximum reaching 12.2V.

In practical usage, the QC module demonstrates a versatile output ranging from 3.5V to 12V. The 6-series input and output ports provide a 24V voltage option, featuring a balanced charging port, rendering the system exceptionally versatile and comprehensive.