INR18650-20R4 18650 Battery 2000mAh 10C 20A High Drain 3.6V Li-ion Rechargeable Cell (Flat Top / Button Top / Spot Welded / Wired Options)

Product Description

Power Your High-Demand Devices with Confidence!
The INR18650-20R4 is a high-performance lithium-ion cell engineered for high-drain applications. Featuring a nominal capacity of 2000mAh and an impressive 10C (20A) continuous discharge rate, this battery delivers robust power with ultra-low internal resistance of just 14mΩ. Whether you are powering a high-intensity tactical flashlight, a high-wattage  power tools, or building a custom battery pack, the INR18650-20R4 offers reliable, consistent energy.

We offer four variants to match your specific assembly needs:

• Flat Top: Standard flat contact, fits most general battery compartments with spring-loaded contacts.

• Button Top: Features a raised positive contact, perfect for flashlights and devices that require this specific geometry.

• Spot Welded: Comes with nickel strips pre-welded, saving you the hassle of spot welding for your DIY battery pack projects.

• Pre-wired: Comes with high-quality silicone wires pre-soldered (Red/Black), ready for plug-and-play connection.

Key Features

• High Discharge Rate: 10C continuous discharge (20A max), delivering strong power output with minimal voltage sag.

• Ultra-Low IR: Internal resistance of only 14mΩ±3, ensuring minimal heat generation and maximum device efficiency.

• Built for Safety: Features a built-in pressure relief vent and stable chemical formulation for safe operation.

• Versatile Configurations: Available in Flat Top, Button Top, Spot Welded, and Wired versions to suit any project.

Parameters

• Model: INR18650-20R4

• Chemistry: Li-ion

• Typical Capacity: 2000mAh

• Minimum Capacity: 1900mAh

• Nominal Voltage: 3.6V

• Charge Cut-off Voltage: 4.2V

• Max Continuous Charge Current: 4A

• Max Continuous Discharge Current (10C): 20A

• Discharge Cut-off Voltage: 2.5V

• Internal Resistance: 14mΩ ± 3

• Dimensions (Flat Top): 18mm x 65mm

• Net Weight: Approx. 44g

Applications

• High-Intensity Flashlights & Headlamps (Recommended: Button Top)

• Cordless Power Tools & Electric Screwdrivers (Recommended: Flat or Welded)

• RC Cars, Drones, and Airplanes (Recommended: Welded or Wired)

• DIY Power Banks & Custom Battery Packs (Recommended: Spot Welded)

FAQ

Q1: What's the difference between Flat Top and Button Top, and which should I choose?
A: Flat Top cells have a flat positive terminal, suitable for devices with built-in spring contacts. Button Top cells have a raised nub on the positive terminal, specifically designed for flashlights that require this extra height. Please check your device's battery compartment depth before purchasing.

Q2: Can I use the "Spot Welded" or "Wired" versions directly?
A: Yes. The wired version comes with pre-soldered leads for easy connection to your BMS or device. The spot-welded version is ideal if you plan to solder them into a custom battery pack. Important: Ensure correct polarity connection and avoid short circuits at all times.

Q3: Is this a suitable replacement for standard 20R batteries?
A: Yes, the INR18650-20R4 is a direct equivalent to the classic 20R cell, with matching capacity, discharge rate, and internal resistance parameters.

Safety Warning:

• Do not throw into fire, water, or attempt to disassemble.

• Always charge using a professional charger with overcharge protection.

• Never over-discharge (below 2.5V) or overcharge (above 4.2V).

• Do not short-circuit the positive and negative terminals.