21700 Tabless

SKU: INR21700-RS50

Original price was: $10.99.Current price is: $4.29.

61% Off

  • 21700 Tabless Battery Cell.
  • 21700 High Drain Battery 14C.
  • 21700 Battery High Capacity 5000mAh.
  • Original 2170 Lithium ion Battery.
  • Tabless Battery Technology.
  • Ternary Lithium Materials.
  • Comprehensive Door-to-Door Shipping Solutions.
  • International Seafreight to Destination Port. (Port of Discharge)
  • Air Freight, DDP(Delivered Duty Paid): 14~21 days, door-to-door.
  • Ocean Freight, FCA/FOB/CIF: Vary from 20 to 50 days depends on port of destination, port-to-port.
  • 12~36 Months Limited Warranty. (Excluding accident, misuse, abuse, neglect, unauthorized repairs or alterations, or normal wear and tear.)
1. Are lithium batteries considered hazmat for shipping?

Yes. Lithium batteries are classified as Class 9 Miscellaneous Dangerous Goods under international and national transportation regulations (such as the IATA DGR for air transport).
They are considered hazardous material (“hazmat”) for shipping because they pose a risk of:

  • Short Circuit: Which can lead to overheating.
  • Fire: If damaged, defective, or improperly packaged, they can catch fire.
  • Explosion: A fire can lead to a rapid release of energy.

Consequently, their shipment is strictly governed by specific packaging, labeling, documentation, and quantity restrictions based on the mode of transport (air, sea, ground).

2. Why is the shipping cost for lithium batteries higher?

Shipping costs for lithium batteries are high due to the significant risks and specialized handling they require.

The primary reasons are:

  • Hazardous Material (Dangerous Goods) Surcharges: Carriers add substantial fees to manage the inherent fire risk of lithium batteries.
  • Specialized Packaging: Mandatory use of non-conductive, fire-retardant, and damage-resistant packaging to prevent short circuits and thermal events.
  • Regulatory Compliance: Costs associated with required dangerous goods training, certified documentation, and specific labeling for each package.
  • Limited Carrier Options & Segregation: Fewer carriers accept lithium batteries, and they often must be stored separately, adding logistical complexity.

In short, the high cost directly reflects the safety measures needed to mitigate the risk of fire during transit.

In stock

21700 Tabless

Model No.INR21700-RS50
Standard Discharge CapacityMin. 4950mAh
Charge: 0.5C(2.5A) CCCV 4.2V, 100mA cut-off, 25±3℃, rest 30min.
Discharge: 0.2C(1.0A), 2.5V cut-off, 25±3℃. 1C=5.0A.
ACIR≤4.0mΩ @1kHz
Nominal Voltage3.6V
End-of-charge Voltage4.2V
Discharge Cut-off Voltage2.5V
Standard Charge Current2.5A
Standard Discharge Current1.0A
C-rate Charge8A
Max. Continuous Charge Current15A
Max. Continuous Discharge Current70A (with 80℃ temperature cut-off)
Operating (Cell Surface) TemperatureCharge: 0℃~60℃
Discharge: -40℃~80℃
Storage Temperature1 Year: -20℃~25℃
3 Months: -20℃~45℃
1 Month: -20℃~60℃
Cell Weight≤67.0g
Cell DimensionDiameter: 21.35mm Max.
Height: 70.30mm Max.
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Committed to powering the next generation of energy storage, Reliance Battery stands at the forefront of innovation with its advanced 21700 tabless cylindrical cells. This proprietary tabless cylindrical cells technology represents a fundamental shift in battery design, directly addressing the limitations of traditional formats. By eliminating the conventional tab, a primary source of internal resistance and failure, Reliance Battery unlocks unprecedented levels of performance, safety, and longevity.

The 21700 tabless platform delivers superior energy density and dramatically lower internal resistance. This translates into faster charging capabilities, higher power output for demanding applications, and exceptional thermal stability, significantly enhancing overall battery safety. These robust cells are engineered to meet the rigorous demands of various sectors, including high-performance electric vehicles, advanced consumer electronics, and large-scale renewable energy storage systems.

By integrating this cutting-edge tabless cylindrical cells architecture, Reliance Battery is not just manufacturing a component but providing a foundational power solution. The company is dedicated to pushing the boundaries of what is possible, ensuring reliability and efficiency for a more sustainable and electrified future.

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