BV front bike light modification

As an ultra-long-distance cyclist, I was frustrated by my bike lights running out of battery mid-journey. The final straw came when the police nearly fined me after my rear light lost power just 30 minutes before I got home, at the end of a 25-hour ride. That experience led me to build a solution with a much longer battery life. This project reuses an existing front light and adds a housing that fits an 18650 battery with much greater capacity. All original parts can be reused, it is just a larger body. Print Settings Layer height: 0.3 mm or lower Infill: 30% Material: ideally, use a durable, water- and UV-resistant filament such as ASA. I used some leftover NYLON-CF mix. Supports: not required for the top, but the body needs something either soluble or easily detachable, such as the organic supports that PrusaSlicer can generate Bill of Materials 1× BV LED light , with the original battery removed. You will reuse everything else, including the screws. 1× 18650 battery, to be soldered in place of the original battery. I used this one