The Hailong 72V 20AH/25AH lithium battery pack, built with 18650/21700 cells, delivers 1440W–1800W power for electric mountain bikes and cars. Its high capacity, lightweight design, and compatibility with fast chargers make it ideal for extended rides and demanding terrains. Safety features like BMS protection and durable casing ensure reliability, while its modular design simplifies maintenance.
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How Does the Hailong 72V Battery Compare to Traditional Lead-Acid Batteries?
The Hailong 72V lithium battery outperforms lead-acid alternatives with a 50% higher energy density, 80% lighter weight, and 3x longer lifespan. Unlike lead-acid, it maintains stable voltage under heavy loads, supports fast charging (4–6 hours), and operates efficiently in temperatures from -20°C to 60°C. Its modular 18650/21700 cell configuration allows partial replacements, reducing long-term costs.
When comparing charge cycles, the Hailong battery completes 1,200 full cycles while maintaining 80% capacity, versus 300-500 cycles for lead-acid models. This translates to 5+ years of daily use compared to 18 months for traditional batteries. The table below illustrates key performance differences:
| Parameter | Hailong 72V | Lead-Acid |
|---|---|---|
| Energy Density | 180Wh/kg | 30-50Wh/kg |
| Weight (20AH) | 5.8kg | 13.5kg |
| Charge Time | 4.5 hours | 8+ hours |
What Maintenance Practices Extend the Hailong Battery’s Lifespan?
Store at 40–60% charge in 15–25°C environments when inactive. Balance-cycle cells monthly using the included 84.4V smart charger. Clean terminals quarterly with dielectric grease, and avoid draining below 20% capacity. For winter use, insulate the battery compartment and limit discharge rates to 0.5C when temperatures drop below 0°C.
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Regular firmware updates through the manufacturer’s app optimize cell balancing algorithms. Users should perform capacity tests every 6 months using the battery’s built-in diagnostic mode. When storing longer than 3 months, discharge to 50% and recharge to 70% every 60 days to prevent electrolyte stratification. Avoid exposing the battery to direct sunlight for extended periods, as UV radiation can degrade the polymer casing over time.
“The Hailong 72V series represents a paradigm shift in e-bike power systems. By adopting automotive-grade 21700 cells, they’ve achieved a 22% increase in range compared to previous models, while the hybrid BMS topology ensures compatibility with regenerative braking systems. However, users should prioritize firmware updates—the new CANbus communication protocol allows real-time health monitoring via Bluetooth apps.”
— Industry Expert, E-Mobility Power Systems
FAQs
- How Long Does the Hailong 72V Battery Take to Charge Fully?
- With the included 5A charger, a 25AH model charges from 20% to 100% in 5.2 hours. Using an optional 10A fast charger reduces this to 2.8 hours. The charger automatically switches to trickle mode upon reaching 84V, preserving cell health.
- Is the Battery Waterproof for Mountain Biking?
- Yes, the IP65 rating protects against heavy rain and temporary submersion up to 30 minutes in 1m depth. However, saltwater exposure requires immediate rinsing with distilled water due to the aluminum casing’s corrosion susceptibility.
- What Warranty Coverage Applies?
- Hailong offers a 24-month warranty covering manufacturing defects and capacity drops below 80% within 500 cycles. The warranty voids if cells are disassembled or charged below -10°C. Optional extended plans cover accidental damage for 3 years.