downtube hailong / polly battery

36V/48/52V battery

Customizable lithium battery packs are the perfect solution for ebike manufacturers and wholesalers who want to stay ahead of the competition.

Our lithium battery packs are assembled with high-quality lithium-ion cells, stable quality BMS and advanced manufacturing techniques, so you can be confident in the safety and longevity.

With our expert engineering and design team, we can create custom Hailong battery packs that meet your specific requirements and provide you with a unique competitive advantage in the market.

Optional Cell: 18650/21700 Samsung, LG, Panasonic, EVE, LISHEN, DLG, CHAM,Sinowatt etc.

Basic specifications
Model SGP- Rear rack 48V 20Ah - sky05
Nominal Voltage 48V
Nominal Capacity 20Ah
Rated Energy 960Wh
assembly 13S4P samsung 50E 5000mah
Maximum Charge Voltage 54.6V
Standard Charge Current 4A
Maximum Charge Current 20A
Maximum Continuous Discharge Current 30A or customized
Maximum Peak Discharge Current (2 seconds) 90A or customized
Discharge Cut-off Voltage 32.5V
suitable motor 750W or 1000W or customized
Charge Temperature 0~+45℃
Discharge Temperature -20~+60℃
Cycle Life (25℃, 80%DOD) >1000 times
discharge line customized as requested
charge connector 3pin
Dimensions(mm) 348*87*133mm (without controller) 348*141*133mm (with controller)
Design life >5 years
Product details
Different dimensions
Product Application

Thanks to its large capacity, this battery pack can power your fat ebike for miles on end. Whether you’re commuting to work or exploring the great outdoors, our Rear Rack sky-05 Battery is the perfect partner for your ebikes

Need help or have questions? We’re just a click or call away. Contact us today and let us help you find the right solution for your needs.