For cyclists and e-bike enthusiasts seeking a reliable, customisable battery housing solution, the Windmeile Hailong 2 Case presents a compelling option. Designed to accommodate 36V configurations with 40 cells in a 10S4P arrangement, this case is engineered for practicality and adaptability. Its compatibility with mid-drive systems such as Bafang, along with its integrated USB output and splashproof construction, makes it a versatile choice for riders looking to tailor their e-bike’s power source to specific needs.
Design and Build Quality
The Hailong 2 Case adopts a sleek, low-profile design intended for mounting on the down tube via an included rail system. This positioning not only optimises weight distribution but also maintains the bike’s aesthetic appeal. The case’s robust polycarbonate shell provides a durable barrier against dust and moisture, with users highlighting its resilience in wet conditions. One cyclist noted, “After several rainy commutes, the interior remained completely dry—no corrosion or issues with the connections.” The matte finish resists scratches, ensuring the case retains a professional appearance even after prolonged use.
A standout feature is the inclusion of a 5V USB circuit board, allowing riders to charge devices such as GPS units or smartphones directly from the battery. This has been praised for its convenience during long rides. “The USB port is a game-changer,” remarked a touring cyclist. “It eliminates the need for carrying bulky power banks, especially on multi-day trips.”
Installation and Compatibility
The case ships with two anti-theft keys, a mounting rail, and cell holders, streamlining the assembly process. Installation on the down tube is straightforward, with the rail system accommodating most standard frame geometries. However, users emphasise the importance of precise alignment to avoid rattling. “Fitting the rail required careful measurement, but once secured, the case stayed firmly in place even on rough trails,” shared a mountain biker.
Compatibility with third-party components is a key strength. The Hailong 2 Case works seamlessly with windmeile’s own controllers and Bafang mid-drive motors, though it is equally effective with other brands. Riders appreciate this flexibility, as it allows for integration into existing builds without proprietary restrictions. “I paired it with a non-windmeile controller, and the performance was flawless,” commented a DIY e-bike builder.
Technical Considerations
Designed for 40 cells in a 10S4P configuration, the case supports high-capacity batteries suitable for extended ranges. The absence of a built-in BMS (Battery Management System) or cells means users must source these separately. While this adds a layer of complexity, it also grants freedom to select premium components. Feedback underscores the importance of using high-quality cells: “Investing in reputable 18650 cells made a noticeable difference in longevity and output stability,” advised an experienced user.
The splashproof rating (IP64) ensures protection against light rain and road spray, though submersion or high-pressure washes are not recommended. Cyclists commuting in inclement weather have reported reliable performance, with one noting, “It handles British drizzle without issue, but I wouldn’t take it through a deep puddle.”
Security and Practicality
The integrated anti-theft mechanism, operated via a physical key, provides a basic yet effective deterrent. While not impervious to determined theft, it discourages opportunistic tampering. “The lock gives peace of mind when leaving the bike outside a café,” said a urban commuter. For added security, some users combine it with a secondary frame lock.
The internal layout, including pre-installed cell holders, simplifies battery assembly. Ventilation channels prevent overheating, though riders in hotter climates recommend periodic checks during intense use. “After a steep climb in 30°C weather, the case felt warm but not concerning,” observed a rider from southern Europe.
User Feedback and Recommendations
Enthusiasts praise the Hailong 2’s balance of modularity and reliability. The ability to customise cell configurations appeals to tinkerers, while the USB feature resonates with practical riders. A common suggestion is to pair the case with a high-amp BMS to maximise efficiency and safety. “A 30A BMS transformed the responsiveness of my setup,” shared a performance-focused cyclist.
Some users recommend applying additional silicone sealant around the USB port for enhanced water resistance, though this is precautionary rather than a necessity. The lack of pre-installed terminals for series connections was noted as a minor inconvenience, requiring careful soldering or spot welding.
Conclusion
The Windmeile Hailong 2 Case excels as a modular, user-serviceable solution for e-bike enthusiasts prioritising flexibility and durability. Its thoughtful design—splashproofing, USB charging, and anti-theft features—caters to both commuters and adventure cyclists. While assembling a complete battery demands technical diligence, the payoff is a tailored power source that adapts to individual riding styles and requirements. For those willing to invest time in component selection, this case offers a future-proof foundation for high-performance e-bike builds.
ASIN: B0B7S3STYH
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