Description
Unlock uncompromising power and capacity with the Samsung INR21700 45T, a high-drain 21700 cell that delivers a massive 35A continuous discharge alongside an impressive 4500mAh capacity. This 10-pack is the ultimate power solution for high-demand applications: e-bike and e-scooter battery packs, heavy-duty cordless tools, high-wattage and extreme-output flashlights. The flat top design ensures broad compatibility with spring-loaded contacts and simplifies spot-welding for custom battery builds. With ultra-low internal resistance and Samsung’s trusted quality, the 45T provides relentless, cool-running power when your device needs it most.
Key Features
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35A Continuous High Drain – Engineered for the most demanding devices. Safely powers e-bike motors, power tools under load, sub-ohm builds, and FET turbo flashlights without dangerous voltage sag.
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4500mAh High Capacity – Significantly longer runtime than typical 4000mAh high-drain cells. Reduces the number of parallel cells needed in large packs while keeping weight down.
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Ultra-Low Internal Resistance (≤12mΩ) – Minimizes heat generation and energy loss under heavy loads. Keeps your cells cooler and your power delivery consistent.
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Flat Top Design – Compatible with all standard 21700 spring-contact chargers, battery trays, and flashlights. The flat terminal is ideal for spot-welding nickel strips into custom packs.
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10-Pack Bulk Value – Perfect for building a 36V or 48V e-bike pack, rebuilding multiple tool batteries, or powering a fleet of high-performance devices.
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Samsung Genuine Quality – Manufactured in Korea with strict quality control. Trusted by industries worldwide for consistent performance and safety.
Parameters
Applications
Recommended For
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E-Bike & E-Scooter Battery Packs: 35A continuous supports powerful 500W–1500W motors, and 4500mAh capacity maximizes range. Ideal for 10S (36V) or 13S (48V) configurations.
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Cordless Power Tools: Impact drivers, drills, circular saws, and high-torque wrenches. Perfect for rebuilding tool packs with more power and longer runtime.
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High-Power Vaping: Mechanical mods and high-wattage regulated devices running sub-ohm builds (safely down to ~0.12Ω at 3.6V). Consistent voltage with minimal sag.
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High-Output 21700 Flashlights: FET-driven hot-rod lights and multi-emitter torches that demand 20–30A for maximum brightness.
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RC Cars, Boats & Drones: Competitive-level models requiring instantaneous high current bursts and extended play sessions.
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DIY High-Current Battery Projects: Spot welders, portable power stations, and any application where both power and capacity are critical.
Not Recommended For
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Low-Power Long-Runtime Devices: Solar lights, wireless sensors, and clocks. Choose a 5000mAh low-drain 21700 cell (e.g., Samsung 50G) for better economy and longer runtime.
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18650-Only Devices: This is a 21700 cell (21mm x 70mm). It will not physically fit in 18650 compartments.
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Applications Requiring Sustained Current >35A: For extreme competition use, choose cells with higher ratings.
FAQ
Q: Can I use this battery for my e-bike? How many cells do I need?
A: Absolutely. The 45T is an excellent choice for e-bike packs. A typical 36V pack uses 10 cells in series (10S). For increased range, you can add parallel strings (e.g., 10S2P with 20 cells, 10S3P with 30 cells). Always use a BMS rated for your pack’s voltage and current.
Q: Is this battery suitable for vaping?
A: Yes. With a 35A continuous discharge and low internal resistance, the 45T safely supports sub-ohm builds down to approximately 0.12Ω at 3.6V, providing a generous safety margin. Always verify your build’s current draw using Ohm’s law.
Q: What is the difference between the Samsung 45T and 40T?
A: Both are 21700 high-drain cells. The 45T offers 4500mAh with a 35A rating, while the 40T offers 4000mAh with a 35A rating (some rate it at 30A continuous). The 45T gives you roughly 12% more capacity, translating to longer runtime in your devices.
Q: Is this a protected cell?
A: No, the 45T is an unprotected flat top cell, which is standard for high-drain applications to allow full current flow. For multi-cell packs, you must install an external BMS rated for at least 40A.
Q: How should I store these cells when not in use?
A: Store at 3.6–3.7V (approximately 40–50% charge) in a cool, dry place. Use non-conductive battery cases to prevent accidental short circuits. Avoid storing fully charged or deeply discharged for extended periods.
