King Kong SYR Battery 18650 48V 21Ah 21700 48V 20Ah lithium ebike battery

King Kong SYR Battery 18650 48V 21Ah 21700 48V 20Ah lithium ebike battery, use samsung/LG/Panasonic 18650  3500mAh cell or 21700 5000mAh cylindrical cell.


  • King Kong SYR Battery 18650 48V 21Ah 21700 48V 20Ah lithium ebike battery also know as 21700 battery from the SYR ebike battery.
  • Most customers choose panasonic/samsung/LG 21700 5000mAh cell to make 4P 20Ah.
  • Widely used in 750W-1000W motor electric bike in North American market, it usually integrated with a 30A BMS.


Model No. FP-EB-SYR-012
Housing Model SYR-012
Nominal Voltage 48V
Output voltage range 36.4V(36.4V=2.8V*13) to 54.6V(54.6V=4.2V*13)
Nominal Capacity 21Ah / 20Ah
Cell Type Pansonic/Samsung/LG Cylindrical 18650 3500mAh / 21700 5000mAh cell
Series Parallel Connection 13S5P 18650 cell / 13S4P 21700 cell
Discharge current Max 30A
Size 441x80x108mm
Protection Over charge voltage protection, Over discharge voltage protection, Over discharge current protection, Over Charge current protection, High temperature protection, Short Circuit Protection.
Connector Option XT connector, Anderson Connector
Prototype Lead Time 7-12 days after confirmed details

Knowledges of King Kong SYR Battery

Basic Knowledges

Production Knowledges

Shipping Knowledges

Certificate Knowledges

Use & Storage Knowledges

Quality guarantee of King Kong SYR Battery


Each battery from Flion will pass electrical features and assembly work quality check and records trackable.


Our batteries can comply with CE/UL/IEC62133/UN38.3&MSDS lithium ion battery standards.


Each battery from Flion comes with a general 12 months warranty, with 18~24 months warranty for option.


With over 12 years design and manufacturing experience of lithium ion battery pack.

Inquiry to Production Process of King Kong SYR Battery

Step 1


  • Collect informations of your contact, company, battery requirement.
  • Battery requirement details includes battery voltage, capacity, size, charge/discharge current, application, quantity..etc
Step 1

Step 2

Sending Inquiry

There below 4 ways to send your lithium battery inquiry.

  1. Send to our email ;
  2. Message via What’s App : +86 18911938253 ;
  3. Click the "ENQUIRY" button and submit inquiry form.
  4. Go to "Contact Us" page and finish the inquiry form.
Step 2

Step 3

Solution & Quoting

  • Free lithium battery pack solution design.
  • Professional quotation and reasonable prices.
Step 3

Step 4


  • Make Lithium battery prototype in around 7-12 days.
Step 4

Step 5


  • Sending battery prototype to customer via UPS/Fedex/DHL, 5-9 days.
Step 5

Step 6

Mass production & Certificates

  • Mass production lead time is aorund 15-35 days depands on quantity.
  • CE/UL/IEC62133/UN38.3 certificates can finished in around 2-4 weeks.
Step 6

Applications of King Kong SYR Battery

  • 750/1000W electric bike, electric fat bike, electric moutain bike ...
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