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Product Description
The BTW / DMEGC INR18650-26E is a Grade-A, high-performance 18650 lithium-ion rechargeable cell designed for steady power delivery, long cycle life, and low internal resistance. Featuring a nominal capacity of 2600mAh and a stable 3.6V / 3.7V output, this flat-top cell is built primarily for custom battery packs, power tools, electric mobility (E-bikes/scooters), high-drain flashlights, and IoT backup energy systems.
With an impressive 1000-cycle life rating (retaining 80% capacity) and continuous discharge performance up to 3C (~7.8A to 15A max depending on thermal conditions), it balances high capacity with robust discharge safety.
⚠️ Safety & Handling Warning: This is an unpaved/unprotected flat-top industrial cell meant for spot welding into pack assemblies or use in devices with built-in Battery Management Systems (BMS) / protection circuitry. Always use a dedicated Li-ion charger (CC/CV 4.2V max cut-off) and never short-circuit or mix cell ages.
Technical & Architectural Highlights
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High Real Capacity (2600mAh): Delivers dependable runtime across medium-to-high draw electronic projects.
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Exceptional Cycle Life: Tested for up to 1,000 full charge/discharge cycles with low degradation.
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Low Internal Resistance ($\le 20-30\text{ m}\Omega$): Reduced thermal buildup during high-current discharge cycles.
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Stable Flat-Top Form Factor: Standardized 18.5mm x 65.2mm dimensions for spot-welding pure nickel strips easily into series/parallel pack matrixes.
🧰 Recommended Battery Pack Assembly Essentials
Building or repairing custom 18650 battery packs? Check out these workbench additions:
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18650 Cell Holders & Spacers (2×1 / 3×2 Grid): Interlocking modular plastic spacers for thermal management and structural rigidity: Pro Tronix Battery Holders
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Pure Nickel Welding Strip Roll: High-conductivity 0.15mm / 0.2mm nickel strips for spot welding: Pro Tronix Nickel Strip Collection
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Li-ion BMS Protection Boards (1S to 13S): Prevent overcharge, over-discharge, and short-circuit faults: Pro Tronix BMS Collection
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PVC Heat Shrink Tubing Wrap: Blue/Pink wrap sleeves for insulating custom packs: Pro Tronix PVC Wrap Collection
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Spot Welding Equipment & Accessories: Precision welder tips and controllers for pack spot welding: Pro Tronix Spot Welder Tools
Technical Specifications
| Parameter | Specification / Value |
| Model / Brand | INR18650-26E (BTW / DMEGC) |
| Chemistry | Lithium-ion (INR / NMC) |
| Form Factor | 18650 Flat Top |
| Nominal Voltage | 3.6V – 3.7V |
| Fully Charged Voltage | 4.20V ($\pm 0.05\text{V}$) |
| Discharge Cut-Off Voltage | 2.50V – 2.75V |
| Nominal Capacity | 2600 mAh |
| Minimum Capacity | 2500 mAh |
| Max Continuous Discharge | 3C (~7.8A to 15A rating) |
| Standard Charging Current | 0.5C (1.3A) / Fast Charge up to 1C (2.6A) |
| Cycle Life | $\ge 80\%$ capacity after 1,000 cycles |
| Dimensions | ~18.45 mm Diameter $\times$ 65.2 mm Length |
| Weight | Approx. 46 g – 48 g |
Common Applications
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E-Mobility & Electric Vehicles: E-Bike, E-Scooter, and golf cart battery pack construction.
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Power Tool Packs: Replacement cells for cordless drill and vacuum battery assemblies.
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Portable Power & Energy Storage: DIY solar power banks, UPS backup systems, and field robotics projects.
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High-Lumen Tactical Flashlights: Reliable continuous power source for high-output LED torches.
What’s in the Box
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1 $\times$ BTW / DMEGC INR18650-26E 2600mAh 3.7V Flat Top Li-ion Cell.
Order online from Pro Tronix for authentic Grade-A battery cells with fast delivery across Egypt!
