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| Categories | Electric Bike Battery |
|---|---|
| Brand Name: | RESKY |
| Model Number: | RSK-7220 |
| Certification: | CE, RoHS, MSDS, Un38.3 |
| Place of Origin: | China |
| MOQ: | 10pcs |
| Price: | Negotiable |
| Payment Terms: | Western Union,T/T |
| Supply Ability: | 500pcs/day |
| Delivery Time: | 15-20days |
| Packaging Details: | Standard exporting packages |
| Rated Capacity: | 20ah |
| Standard Voltage: | 72V |
| Electrolyte: | Li-ion |
| Cell: | 21700 5000mAh Battery Cell |
| Motor: | Above 1000W |
| Charging Cut-off Voltage: | 84V |
| Dishcarging Cut-off Voltage: | 50V |
| Color: | Blue PVC |
| Cycle Life: | 500cycles |
| Shipping: | UPS, FedEx, TNT, DHL, by Air, by Sea |
| Company Info. |
| Shenzhen Resky Electronics Co., Ltd. |
| Verified Supplier |
| View Contact Details |
| Product List |
Solar 21700 Li-Ion Cell 72v 20S4P 20Ah 1400w Power Lithium Ion Battery Pack For Electric Motocycle
Specification:| Product name | 72V 20Ah |
| Model | RSK-7220 |
| Rated Capacity | 20Ah |
| Nominal Voltage | 72V |
| Over discharge protection voltage | 50V±0.05V |
| Over charge protection voltage | 84V±0.05V |
| AC Impedance New Cell Max.(mΩ) | ≤100 mΩ |
| Maximum Continuous Charge Current | ≤2A adjustment |
| Maximum Continuous Discharge Current | ≤10A adjustment |
| Maximum Pulse discharge current | ≤20A adjustment |
| Operation Temperature Range | Charge: 0~45°C,Discharge: -20~60°C |
| Storage Temperature Range | Less than 1 year: -20~25°C |
| Less than 3 months: -20~40°C | |
| Storage Temperature Range | Less than 30 Days: -25°C~45°C |
| Less than 90 Days: -25°C~30°C | |
| Weight | Approx 6.5kg |
| Cycle Characteristic | 500 times |
Advantages for 21700 li-ion battery packs:
1. Superior Energy Density
The 21700 cells (21mm diameter, 70mm length) offer higher energy
density compared to older 18650 cells, storing more power in a
compact form. This makes the pack ideal for space-constrained
applications like e-bikes or portable power tools, providing
extended runtime without bulk.
2. Extended Cycle Life
Utilizing advanced lithium-ion chemistry, the pack typically
achieves 500–1000 charge cycles while retaining 80% capacity.
Proper maintenance and a integrated BMS further enhance longevity,
offering long-term cost savings.
3. Integrated Safety Mechanisms
Equipped with a Battery Management System (BMS), the pack
safeguards against overcharge, over-discharge, short circuits, and
thermal runaway. Premium 21700 cells often include built-in safety
vents and stable chemistry to minimize failure risks.
4. Broad Temperature Tolerance
Operates effectively across a wide range (-20°C to 60°C), making it
suitable for extreme environments, from winter outdoor use to
high-temperature industrial settings. Storage stability is also
enhanced with low self-discharge (1–2% monthly).
Pictures:
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