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INR21700 5000mAh 70A Ultra High Power Full Tab / Tabless Lithium-ion Battery Cell for Drones, Power Tools, Cleaners & E-Mobility

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INR21700 5000mAh 70A Ultra High Power Full Tab / Tabless Lithium-ion Battery Cell for Drones, Power Tools, Cleaners & E-Mobility

Brand Name:	Reliance
Model Number:	RS50
MOQ:	130
Price:	$3.2
Packaging Details:	130pcs/Carton box
Payment Terms:	T/T

Detail Information

Product Description

Ratings & Reviews

Detail Information

Place of Origin:

China

Certification:

UN38.3/CE/UL/IEC62133/KC/BIS

Document:

Nominal Voltage:

Nominal Capacity:

5000mAh (Min. 4950mAh @ 0.2C)

AC Internal Impedance:

≤ 4.0 MΩ (@ 1kHz, Typical ~3.0mΩ)

Max. Fast Charge:

15A (3C Fast Charge)

Max. Discharge:

70A (with 80°C Surface Thermal Cut-off)

Cell Dimensions:

Max. Diameter: 21.35mm / Max. Length: 70.30mm

Supply Ability:

500K/Month

Highlight:

INR21700 lithium-ion battery cell

5000mAh high power battery

70A full tab battery cell

Product Description

INR21700 5000mAh 70A Ultra High Power Full Tab / Tabless Lithium-ion Battery Cell

The INR21700 5000mAh is a next-generation high power cylindrical lithium-ion cell designed to meet the extreme energy demands of modern industrial and commercial equipment. Engineered with state-of-the-art full tab (tabless) internal architecture, this cell boasts an ultra-low AC internal resistance (ACIR ≤ 4.0mΩ).

Technical Specifications

Specification Parameter	Technical Value / Detail
Cell Model	RS50 INR21700 Series (5000mAh)
Nominal Voltage	3.6V
Nominal Capacity	Typical ~5000mAh (Min. 4950mAh @ 0.2C)
AC Internal Impedance (ACIR)	≤ 4.0 mΩ (@ 1kHz, typical ~3.0mΩ)
Charge Cut-off Voltage	4.20V
Discharge Cut-off Voltage	2.50V
Standard Charging Current	2.5A (0.5C)
Max. Fast Charge Current	15A (3C Fast Charge)
Max. Continuous Discharge	70A (with 80°C surface thermal cut-off)
Cell Dimensions	Max. Diameter: 21.35mm / Max. Length: 70.30mm
Cell Weight	≤ 67.0g
Operating Temperature	Charge: -20°C to 60°C / Discharge: -40°C to 80°C
Storage / Shipping SOC	3.46V ~ 3.52V (~30% SOC)

Key Performance Highlights

Advanced Tabless / Full Tab Structure: Features cutting-edge full-tab construction that drops internal resistance to ≤ 4.0mΩ, vastly lowering operating temperatures under high-current loads.
Extreme High-Drain Capacity: Effortlessly sustains continuous 40A currents with surface temperatures kept under 70°C, while capable of handling burst pulse discharges up to 90A.
Unrivaled Low-Temperature Performance: At -20°C under 40A load, initial output voltage stays above 2.2V; at -40°C extreme cold, delivers steady 10A current with initial voltage exceeding 2.3V.
Long Cycle Life Expectancy: Heavy-duty use retains ≥80% capacity at 500 cycles; deep cycle use delivers over 1000 cycles; standard use achieves 1500+ full charge/discharge cycles.
Certified Safety Standards: Verified compliant with UN38.3, UL1642 crush tests (13kN), drop tests, high-voltage overcharge, 130°C thermal exposure, and short-circuit protection.

Primary Applications

Industrial Drones & UAVs: Heavy-payload multirotors, agricultural spraying drones, aerial mapping UAVs, and high-discharge FPV platforms
Professional Power Tools: High-torque drills, rotary hammers, circular saws, lawnmowers, and heavy-duty gardening machinery
Commercial Cleaning Appliances: High-suction cordless vacuum cleaners, smart floor scrubbers, and automated sweeping robots
Light Electric Vehicles (LEVs): High-performance e-motorcycles, premium electric bikes, urban e-scooters, and golf carts
Portable Energy Storage Systems (ESS): High-wattage outdoor generator stations, solar power packs, and emergency UPS backups

Safety Instructions & Handling Guidelines

Dedicated Lithium Charger Only: Always charge using a reliable, dedicated Li-ion charger set to 4.2V cut-off limit.
Voltage Range Protection: Do not overcharge past 4.2V or over-discharge below 1.5V.
BMS Requirement: Cells must be assembled with a qualified Battery Management System featuring thermal, over-current, and short-circuit protection.
Thermal Precaution During Welding: Avoid prolonged heat contact; direct soldering on terminals is prohibited.
Short-Circuit Prevention: Never carry bare cells near metal objects; always transport with insulating terminal caps.
Storage Protocol: For long-term storage, maintain partial state of charge (3.45V to 3.95V) in cool, moisture-controlled environment.

Ratings & Review

Overall Rating

5.0

Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings

5 stars

100%

4 stars

3 stars

2 stars

1 stars

All Reviews

Velentas

Italy Mar 2.2026

trustpilot.com

Helpful (97)

Questa batteria con 5000mAh, buona scarica da 80A, mi piace questa batteria

A*u

Germany Nov 7.2025

trustpilot.com

Helpful (48)

The packaging was good, nothing was damaged. I waited for over a month to receive the goods, and the battery cells are good.

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products details

18650 Cylindrical Cells

21700 Cylindrical Cells

Full Tab Cylindrical Cells

LiFePO4 Prismatic Cells

12.8V LiFepo4 Battery

25.6V LiFepo4 Battery

Home Energy Storage Batteries

LiFePO4 Cylindrical Cells

Semi Solid State Power Bank

INR21700 5000mAh 70A Ultra High Power Full Tab / Tabless Lithium-ion Battery Cell for Drones, Power Tools, Cleaners & E-Mobility

INR21700 lithium-ion battery cell

5000mAh high power battery

70A full tab battery cell

Overall Rating

Rating Snapshot

All Reviews

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