Samsung INR21700-45T 4500mAh 35A Li-ion Battery for Power Tools, RC & DIY Battery Packs (1-100 PCS)

The Samsung INR21700-45T 4500mAh 35A Continuous Discharge Li-ion Rechargeable Battery is an ultra-high performance 21700 cylindrical power cell manufactured by Samsung SDI and supplied by DXF POWER with strict quality grading. Designed for extreme current applications, this flat-top bare cell delivers a generous 4500mAh typical capacity (4400mAh minimum) on a 3.6V nominal platform with a massive 35A continuous discharge capability without thermal cut-off (and up to 50A continuous when monitored with an 80°C temperature cut). Combining sustained high-power output, rapid charging capability (up to 6A continuous / 9A step charge), and exceptional voltage retention under heavy loads, it is the premier choice for high-draw cordless power tools, RC models, electric skateboards, e-bikes, and custom DIY battery packs.

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Key Features

• Genuine Samsung SDI 45T Cell: Authentic Grade-A 21700 cylindrical power cell engineered for demanding high-drain industrial and hobby applications
• 35A Constant Continuous Discharge: Delivers true 35A constant current without temperature cut-off (and up to 50A continuous with 80°C thermal monitoring)
• 4500mAh High Capacity: Typical 4500mAh (4400mAh minimum) capacity balances extreme discharge power with long runtime
• High-Speed Charging Capability: Supports up to 6A continuous rated charge (full charge in approx. 75 minutes) and 9A step charging
• Robust Thermal & Cycle Stability: Operates across a wide temperature range (-20°C to 60°C discharge) with proven cycle retention under high-amp discharge
• Standard 21700 Bare Cell: Flat-top form factor (Max 21.35mm diameter × 70.62mm height) optimized for spot-welded custom battery packs
• Multiple Pack Bundles: Available in 1, 10, 20, 50, and 100 piece packages to suit single cell replacements or large-scale pack fabrication
• Strict Factory Quality Testing: Cells are inspected for voltage balance, low internal resistance, and capacity consistency across every batch

Specifications, Per Battery

• Brand / Manufacturer: Samsung SDI (Supplied by DXF POWER)
• Model / Part No.: INR21700-45T (45T)
• Cell Type: 21700 Cylindrical Rechargeable Lithium-ion (Li-ion)
• Positive Pole: Flat (Flat Top)
• Protection Circuit: No (Unprotected industrial bare cell)
• Typical Discharge Capacity: 4500mAh (0.2C / 0.9A discharge to 2.5V @ RT)
• Minimum Discharge Capacity: 4400mAh (Rated min. 4300mAh at 10A discharge)
• Nominal Voltage: 3.6V
• Standard Charge: CCCV, 2.25A (0.5C), 4.20V, 225mA cut-off (approx. 150 min)
• Rated Fast Charge: CCCV, 6A, 4.20V, 100mA cut-off (approx. 75 min)
• Max. Charge Current: 6A (continuous charge) / 9A (for step charge)
• Discharge Cut-off Voltage: 2.5V (End of discharge)
• Max. Continuous Discharge: 35A (without temperature cut) / 50A (with 80°C temperature cut)
• Cycle Life: ≥ 2700mAh after 250 cycles at 35A discharge (or after 100 cycles at 50A discharge with 80°C cut-off)
• Operating Temperature: Charge: -10°C to 60°C; Discharge: -20°C to 60°C
• Storage Temperature: 1 year: -20°C to 23°C; 3 months: -20°C to 45°C; 1 month: -20°C to 60°C
• Maximum Cell Dimensions: Diameter: Max. 21.35 mm × Height: Max. 70.62 mm
• Cell Weight: Max. 72.0 g
• Applications: Cordless power tools, RC models, high-drain electric skateboards, e-bikes, robotics, and custom DIY battery packs

Package Includes

• Samsung INR21700-45T 4500mAh 35A battery cells, quantity chosen from 1, 10, 20, 50, or 100 PCS
• Protective packaging / cell box
• User manual and battery safety guide

Choose Your Ideal Power Bundle

• 1 PCS – Quick Replacement & Testing: Single cell for tool testing, flashlight upgrade, or individual cell repair
• 10 PCS – Cordless Tool Pack Rebuilds: Perfect for rebuilding heavy-duty power tool battery packs (drills, grinders, saws)
• 20 PCS – High-Output Modules: Ideal for RC models, robotics, and compact high-drain DIY power packs
• 50 PCS – Mobility & Energy Modules: Tailored for high-performance electric skateboards, e-bikes, and portable power stations
• 100 PCS – Master Builder Bulk Set: Best value for workshops, custom pack assemblers, and volume battery builders

Purchasing in bundles ensures matched cell batches for balanced series and parallel assembly.

180-Day Warranty & Customer Support

Every cell batch supplied by DXF POWER is covered by a 180-day manufacturer warranty against defects in materials and craftsmanship. Our technical support team is always available to assist with charging parameters, pack layout recommendations, and safety practices.

Usage & Safety Guidelines

• Use a dedicated lithium-ion smart charger supporting CC/CV charging mode.
• Never charge above 4.20V per cell or discharge below 2.5V per cell.
• Do not exceed cell surface temperature of 80°C during heavy continuous discharge.
• Always inspect cell outer shrink wrap, insulator ring, and terminals for damage before use; rewrap immediately if damaged.
• Never carry loose 21700 batteries in pockets, bags, or purses with metal objects like keys or coins; always store in an insulated battery case.
• Do not short-circuit, crush, incinerate, puncture, or submerge cells in water.
• Store batteries at 3.60V–3.85V per cell in a cool, dry, well-ventilated location away from direct sunlight.
• When building multi-cell packs, always integrate a quality Battery Management System (BMS) with over-current, over-charge, over-discharge, and thermal balance protection.

Why Choose DXF?

• Genuine Grade-A Samsung SDI 45T cells with true 4500mAh capacity and 35A/50A high-drain output
• Tested continuous discharge performance under demanding operational loads
• Carefully matched batches for balanced series and parallel pack assembly
• Strict factory pre-shipment quality checks and secure protective packaging
• Global warehouse logistics network and professional technical customer support

Perfect For

Engineered for contractors, RC hobbyists, e-mobility builders, and DIY pack fabricators demanding high 4500mAh capacity and extreme 35A/50A continuous discharge for high-power cordless tools, electric skateboards, robotics, and custom energy modules.

Power your projects with trusted Samsung 21700 performance. Learn more about setups and battery care on the DXF YouTube channel.