LG INR21700 M52V | High-Capacity Premium 21700 Lithium-Ion Cell

Overview
The LG INR21700 M52V is a next-generation cylindrical lithium-ion cell tailored for high-demand applications like power tools, electric vehicles, industrial battery packs, energy storage systems (ESS), and advanced DIY battery builds. Engineered by LG Energy Solution, it blends impressive energy capacity, high discharge rates, and rigorous safety standards.

Battery Pack Design Notes
When designing battery packs with M52V cells, adhere strictly to LG’s recommended parameters for charge/discharge current, voltage thresholds (4.20 V max charge / 2.50 V min discharge), and protective functions to ensure safety and optimal lifespan.

📥 Downloads

INR21700_M52V

📄 Specifications 

LG INR21700 M52V • 5000 mAh High-Capacity 21700 Cell

• Capacity: 5 Ah (18.34 Wh) nominal

• Voltage: 3.69 V nominal (4.20 V – 2.50 V operating window)

• Continuous Discharge: 15 A (3 C) @ 25 °C

• Peak Pulse Power: up to 68 W

• Internal Resistance: ≤ 20 mΩ

• Cycle Life: ≥ 86 % capacity retained after 500 cycles

• Weight: 67.4 g ±1g

• Size: 21.1 mm (Ø) × 70.6 mm (H)

• Operating Temp: charge 0–45 °C / discharge -20–55 °C (cell surface up to 70 °C)

• Certifications: UL2580 & UN38.3 for ESS/EV-grade quality

Why Choose the M52V?
This cell bridges the gap between high-capacity and high-power performance. Its robust 5 Ah rating, low impedance, and high continuous current make it ideal for rugged applications—everything from heavy-duty power tools to backup power systems.

Ideal Applications:

• DIY high-performance battery packs

• Electric vehicle prototypes

• Portable power stations and ESS

• Industrial & medical backup power

Safely Designed for OEM Use
Be sure to integrate essential pack protections (over-voltage, under-voltage, over-current, thermal cut-outs) in line with LG’s official specs. Cells should only be ordered and assembled through authorized distributors and used in professionally designed packs.

⚠ Important Safety Warnings

Improper use of lithium-ion batteries can cause fire, explosion, or serious injury. These cells are intended only for use in battery packs with a BMS (Battery Management System) or Protection Circuit Board (PCB). Do not use as standalone cells or in e-cigarettes, vape devices, or unprotected applications.

Key Safety Guidelines:

• Never carry loose batteries in your pocket, purse, or bag — risk of short circuit and fire.

• Always store and transport in a protective case.

• Inspect before use: Do not use if damaged, leaking, bulging, or the wrapper is torn.

• Charge safely: Use a smart charger designed for lithium-ion cells. Never overcharge or leave unattended.

• Do not crush, puncture, modify, expose to liquid, solder directly, or short circuit.

• For thermal runaway (swelling, smoke, heat): move to a fire-safe surface and use Class D extinguisher or sand — never water.

Disclaimer:
Rechargeable Power Energy (RPE) is not responsible for misuse, improper handling, or unsafe pack assembly. Buyers and resellers accept full responsibility for safe use. Cells must be packaged individually — do not sell or ship loose.

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