- Stock: In Stock
- Model: INR21700-45T
Original Samsung INR21700-45T 4400mAh 50A High-Drain Rechargeable Li-ion Battery
Engineered for ultra-high discharge applications, the original Samsung INR21700-45T features an impressive 4400 mAh capacity paired with an extraordinary continuous discharge rate of 35A (up to 50A with an 80°C temperature cutoff). Built in the 21700 form factor, it offers exceptionally low internal resistance and minimal voltage sag, making it the ultimate high-drain choice for demanding power tools, high-performance e-mobility, and high-amp battery packs.
- Battery Type / Size: Li-ion 21700 (Rechargeable)
- Nominal Capacity: 4400 mAh (Min. 4300 mAh)
- Nominal Voltage: 3.6V - 3.7V (Full Charge: 4.2V)
- Discharge Rating: 35A Continuous | 50A Max Continuous (with 80°C temperature cutoff)
- Terminal Type: Flat Top
- Applications: Heavy-duty power tools, high-performance electric skateboards/bikes, high-lumen flashlights, racing drones, and high-amp custom battery packs (spot-welding compatible).
Long Product Description (Detailed Listing)
Original Samsung INR21700-45T 4400mAh 50A High-Drain 21700 Lithium-Ion Cell
The Samsung INR21700-45T represents the next generation of ultra-high-drain 21700 lithium-ion technology. Succeeding earlier high-power cells, the 45T bridges the gap between high current output and substantial capacity, delivering 4400 mAh nominal capacity alongside a staggering 50A max continuous discharge rate when thermal protection is utilized. Manufactured by Samsung SDI, this cell exhibits ultra-low internal resistance, guaranteeing maximum efficiency and minimal voltage sag under heavy load.
Capable of handling a constant 35A current draw without thermal throttling and scaling up to 50A with temperature management, the Samsung 45T is built specifically for extreme power requirements. Its optimized construction makes it ideal for multi-series and multi-parallel configurations (10S, 13S, 16S, etc.) using spot-welding nickel strips.
Key Features & Highlights:
- Extreme Current Handling: Up to 50A continuous discharge rate delivers immediate power to heavy-duty applications without excessive voltage drop.
- Ultra-Low Internal Resistance: Advanced cell construction reduces internal heat generation and maximizes overall energy transfer efficiency.
- High Energy & Power Balance: 4400 mAh capacity ensures extended runtimes without sacrificing high-amperage output capability.
- Heavy-Duty Versatility: Highly suited for industrial power tools, electric mobility vehicles, custom high-output power supplies, and high-discharge DIY battery modules.
Technical Specifications:
| Parameter | Value |
|---|---|
| Brand / Model | Samsung SDI / INR21700-45T |
| Chemistry | Li-ion (NMC) |
| Form Factor | 21700 |
| Nominal Capacity | 4400 mAh |
| Minimum Capacity | 4300 mAh |
| Nominal Voltage | 3.60V |
| End-of-Charge Voltage | 4.20V ± 0.05V |
| Discharge Cut-off Voltage | 2.50V |
| Max Continuous Discharge Current | 35A (without temp cut-off) | 50A (with 80°C temp cut-off) |
| Standard Charge Current | 2.2A (0.5C) |
| Fast Charge Current | 6.0A |
| Internal Resistance (AC 1kHz) | ≤ 9 mΩ |
| Dimensions | Diameter: 21.25 mm | Height: 70.70 mm |
| Weight | Approx. 70.0 g |
| Terminal Construction | Flat Top |
Safety & Usage Notice:
- Li-ion cells are unprotected industrial batteries.
- Must be used with a suitable BMS (Battery Management System) designed to handle high continuous currents.
- Do not short-circuit, overcharge above 4.2V, or over-discharge below 2.5V.
- Keep away from heat sources and direct sunlight; actively monitor cell temperature during high-discharge operation.
