21700 5000mAh Hailong Ebike Battery OEM/ODM Customizable IP65 Waterproof Hailong Lithium Battery for Bulk Wholesale

Engineered for e-bike manufacturers, wholesalers, and fleet managers, this high-performance 48V 20Ah lithium e-bike battery utilizes premium 21700 5000mAh Grade-A cells. As a dedicated custom manufacturer and OEM/ODM supplier, we build battery packs tailored to your precise physical and electrical specifications, offering integrated smart BMS protection, durable enclosures, and customizable connectors.

• 21700 5000mAh Cell Configuration: Uses high-density 21700 Grade-A cells, delivering higher single-cell capacity compared to standard 18650 cells for optimized energy density and steady power output.
• Parameterized Smart BMS Protection: Monitors voltage thresholds (Overcharge 4.25V±0.05V / Overdischarge 2.8V±0.1V) and thermal conditions (-20°C to 60°C) to protect internal circuit logic.
• Rugged IP65 Housing: High-impact ABS+PC casing built to resist vibration and moisture, complete with a mechanical safety lock and 5-stage LED power indicator.
• Precision Cell Matching: Assembled with automated spot/laser welding after voltage and internal resistance matching (≤2mΩ variance) to reduce thermal buildup.

As an experienced custom manufacturer and OEM/ODM supplier, we provide fully customized battery solutions:

• Voltage & Capacity: Custom 36V, 48V, 52V, 60V, or 72V designs tailored to your specs.
• Cell Options: Grade-A domestic cells or brand-name cells (Samsung, LG).
• Smart BMS Features: Optional CANbus, RS485 communication protocols, and Bluetooth monitoring.
• Enclosures & Connectors: Down tube, rear rack, or integrated frame styles. Connectors available in XT60, XT90, Anderson, GX16, and waterproof plugs with custom logo branding.

• Quality Assurance: Manufactured in an ISO9001 certified facility with 100% full inspection, including automated aging tests and insulation safety checks before shipment.
• Logistics Compliance: Fully compliant with UN38.3 and MSDS transport standards, supporting sea, air, and DDP (Delivered Duty Paid) door-to-door shipping to North America and Europe.
• Production Lead Time: Sample evaluation ready in 7–10 working days; bulk custom orders delivered in 15–25 working days.

• City Commuter E-bikes
• Mountain E-bikes (e-MTB)
• Cargo & Delivery E-bikes
• Fat Tire Snow & Beach E-bikes

Please inform us of your required Voltage, Capacity, Battery Dimensions, Connector Type, Quantity, and Delivery Destination. Our engineering team will evaluate your specifications and recommend the most suitable battery solution.