In this engaging video, Seth from Berm Peak Express documents his first attempt at building a custom, compact e-bike battery called the Burmicell 14S, constructed from 14 Samsung 18650 cells wired in series to produce 52 volts. The video chronicles a comprehensive real-world test of this DIY battery, exploring its capabilities through multiple mountain bike park laps and a commute test. Using a custom-built battery pack with only 150 watt-hours of capacity, Seth demonstrates the battery’s surprising performance by completing three challenging mountain bike laps with significant elevation gains and then riding approximately 12.8 miles on a greenway. Throughout the experiment, he highlights the battery’s potential for specialized uses like short rides, lunch breaks, or as a compact range extender, while also emphasizing the potential for creating custom battery shapes and sizes. The video serves not just as a technical demonstration but also as an inspirational exploration of DIY e-bike technology, showing that smaller, more specialized batteries can be practical and effective when designed thoughtfully.
