LG F1L INR18650-F1L 3350mAh 4.88A Li-ion Battery for Flashlights, E-Bikes & DIY Battery Packs (1-100 PCS)

The LG F1L INR18650-F1L 3350mAh 4.88A Continuous Discharge Li-ion Rechargeable Battery is an ultra-high energy density 18650 cylindrical cell manufactured by LG Chem and supplied by DXF POWER with strict quality grading. Engineered for maximum runtime in high-end portable electronics, energy storage, and light electric mobility, this flat-top bare cell delivers an impressive 3350mAh nominal capacity (3250mAh minimum / 12Wh) on an average 3.63V nominal platform with a dependable 1.5C (4875mA / ~4.88A) continuous discharge rating. Recognized for its excellent energy retention, low self-discharge, and proven thermal safety, the LG F1L is the optimal power solution for long-range flashlights, portable power stations, e-bikes, medical devices, and custom DIY battery packs.

Watch DXF Batteries in Action

Key Features

• Genuine LG Chem F1L Cell: Authentic Grade-A 18650 cylindrical cell engineered for ultra-high energy density and extended runtimes
• 3350mAh Ultra-High Capacity: 3350mAh nominal capacity (3250mAh minimum / 12Wh) providing industry-leading endurance for battery-powered equipment
• 1.5C / 4.88A Continuous Discharge: Delivers up to 4875mA continuous output without thermal cut-off, tailored for steady medium-drain loads
• Average 3.63V Platform: Optimized voltage stability with 4.2V standard charging and 2.5V discharge cut-off
• Standard 18650 Flat-Top Design: Standard dimensions of ~18.5 mm diameter × 65.0 mm height and ~49.0 g weight, ideal for precision spot welding
• Multiple Pack Bundles: Available in 1, 10, 20, 50, and 100 piece packages for individual replacements or large-scale 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: LG Chem (Supplied by DXF POWER)
• Model / Part No.: INR18650F1L / INR18650-F1L (F1L)
• Cell Format: 18650 Cylindrical Rechargeable Lithium-ion (Li-ion)
• Positive Pole: Flat (Flat Top)
• Protection Circuit: Without (Unprotected industrial bare cell; requires compatible device-level or pack-level protection)
• Nominal Capacity: 3350mAh (12Wh)
• Minimum Capacity: 3250mAh
• Nominal Voltage: Average 3.63V
• Max. Continuous Discharge Current: 1.5C / 4875mA (~4.88A) at 5°C–50°C (0.5C / 1625mA at -20°C–5°C)
• Discharge Cut-Off Voltage: 2.5V (Standard 0.2C / 650mA)
• Standard Charge: CC-CV 0.5C (1625mA) to 4.2V, 50mA cut-off
• Max. Charge Current: 0.5C (1625mA)
• Max. Charge Voltage: 4.2V ± 0.05V
• Operating Temperature: Charge: 0°C to 45°C; Discharge: -20°C to 50°C
• Cell Dimensions: Diameter: ~18.5 mm × Height: ~65.0 mm
• Cell Weight: Approx. 49.0 g
• Applications: High-lumen LED flashlights, portable power banks, electric bicycles (e-bikes), scooters, and custom DIY battery packs

Package Includes

• LG F1L INR18650-F1L 3350mAh 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, testing, or individual cell repair
• 10 PCS – Portable Light & Device Packs: Ideal for high-lumen multi-cell torches, camping lanterns, and small electronics
• 20 PCS – Compact Energy Modules: Perfect for small portable power banks, robotics, and auxiliary power supplies
• 50 PCS – E-Bike & Mobility Packs: Sized for building and refurbishing standard 36V/48V electric bicycle packs
• 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 up to 4.20V.
• Never charge above 4.25V per cell or discharge below 2.50V per cell.
• Never exceed the maximum continuous discharge current of 1.5C (4.88A).
• Always inspect cell outer shrink wrap, insulator ring, and terminals for damage before use; rewrap immediately if damaged.
• Never carry loose 18650 batteries in pockets, bags, or purses with metal objects like keys or coins; practical storage in an insulated battery case is essential.
• 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 LG Chem F1L cells with true 3350mAh capacity and reliable continuous output
• Ultra-high energy density for long-lasting portable and mobile power
• 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 flashlight enthusiasts, e-bike builders, and DIY pack fabricators demanding dependable 3350mAh high capacity and stable continuous discharge for extended-runtime lighting, electric mobility, and custom energy storage modules.

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