Samsung INR21700-53G 5300mAh 15.9A Li-ion Battery for E-Bikes, Flashlights & DIY Battery Packs (1-100 PCS)

The Samsung INR21700-53G 5300mAh 15.9A Continuous Discharge Li-ion Rechargeable Battery (the enhanced next-generation successor to the popular 50G cell) represents the pinnacle of energy density in the 21700 form factor. Manufactured by Samsung SDI and supplied by DXF POWER with strict quality grading, this flat-top unprotected cell delivers an industry-leading 5300mAh typical capacity (5140mAh minimum) on a 3.63V nominal platform with a robust 3C (15.9A / 15,900mA) maximum continuous discharge rating. Engineered for sustained runtime, exceptional 1,000-cycle life longevity, and reliable thermal stability, the 53G is the ultimate choice for electric bicycles (e-bikes), electric scooters, high-performance LED torches, robotics, solar storage, and custom DIY battery packs.

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Key Features

• Genuine Samsung SDI 53G Cell: Authentic Grade-A 21700 cylindrical cell engineered in Korea/Malaysia, offering state-of-the-art 5300mAh energy density
• 15.9A (3C) Continuous Discharge: Robust 15,900mA maximum continuous current capability powers demanding electric mobility and portable devices
• Industry-Leading 5300mAh Capacity: 5300mAh typical (5140mAh minimum) delivers class-leading runtime for long-distance rides and extended illumination
• Outstanding 1,000+ Cycle Durability: Maintains ≥80% of initial capacity even after 1,000 charge/discharge cycles under recommended cycling conditions
• Fast CC-CV Charging Support: Supports 0.33C (1,749mA) standard charging with up to 5,300mA maximum charging current
• Standard 21700 Flat-Top Design: Dimensions of Φ Max 21.30 mm diameter × Max 70.70 mm height with flat top terminal, optimized for spot welding and custom pack builds
• Multiple Pack Bundles: Available in 1, 10, 20, 50, and 100 piece packages to suit single replacements or bulk battery pack fabrication
• Strict Factory Quality Testing: Cells are inspected for voltage balance, internal resistance, and capacity consistency across every batch

Specifications, Per Battery

• Brand / Manufacturer: Samsung SDI (Supplied by DXF POWER)
• Model / Part No.: INR21700-53G (53G, Ver. 2)
• Cell Type: 21700 Cylindrical Rechargeable Lithium-ion (Li-ion)
• Positive Pole: Flat (Flat Top)
• Protection Circuit: No (Unprotected industrial bare cell)
• Typical Discharge Capacity: 5300mAh (1C = 5,300mA rating)
• Minimum Discharge Capacity: 5140mAh (0.2C / 1060mA discharge to 2.5V @ RT)
• Nominal Voltage: 3.63V
• Charging Method: CC-CV (constant voltage with limited current)
• Standard Charging Current: 0.33C (1,749mA)
• Max. Charging Voltage: 4.2V (4.15V recommended for extended cycle life)
• Max. Charging Current: 5,300mA (5.3A)
• Discharge Cut-off Voltage: 2.5V (3.0V recommended for extended cycle life)
• Max. Continuous Discharge Current: 3C (15,900mA / 15.9A)
• Cycle Life: Capacity ≥ 80% after 1,000 cycles (80% of initial capacity @ RT)
• Operating Temperature: Charge: 0°C to 45°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: Φ Max. 21.30 mm × Height: Max. 70.70 mm
• Cell Weight: Max. 71.5 g
• Manufacturing Sites: Korea & Malaysia
• Applications: Electric bicycles (e-bikes), electric scooters, high-lumen flashlights, robotics, portable energy storage, and custom DIY battery packs

Package Includes

• Samsung INR21700-53G 5300mAh 15.9A 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 flashlight upgrade, tool testing, or individual cell repair
• 10 PCS – Small Pack Rebuilds: Perfect for rebuilding portable power banks and handheld devices
• 20 PCS – Auxiliary & Mobility Modules: Ideal for 24V/36V auxiliary modules, robotics, and compact DIY power packs
• 50 PCS – E-Bike & Scooter Battery Packs: Tailored for ultra-high capacity 36V/48V electric bike packs, e-scooters, and portable energy stations
• 100 PCS – Volume Pack Assembly: 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.
• Standard charging voltage is 4.20V (charge to 4.15V to maximize cycle life).
• Discharge cut-off voltage is 2.5V (3.0V recommended for prolonged cycle life).
• Charge within 0°C to 45°C; discharge within -20°C to 60°C.
• 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 53G cells with industry-leading 5300mAh capacity and 15.9A continuous output
• Tested continuous discharge performance and outstanding 1,000+ cycle durability
• 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 e-mobility builders, DIY pack fabricators, contractors, and flashlight enthusiasts demanding maximum 5300mAh capacity, reliable 15.9A continuous output, and long 1,000-cycle durability for electric bikes, e-scooters, robotics, and custom energy storage modules.

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