Maximize your runtime with the 2Pack Samsung 50E 21700 Battery (Model: INR21700-50E). Engineered for high-capacity applications, this 21700 lithium-ion cell delivers an impressive 5000mAh capacity with a stable 9.8A continuous discharge (20A pulse), making it the perfect choice for devices that need to run longer between charges. Whether you are upgrading your e-bike battery pack, powering a high-lumen flashlight, or building a portable power station, the Samsung 50E provides reliable, safe, and consistent energy. This listing includes two individual cells (not pre-assembled), giving you the flexibility to configure them in series or parallel for your specific project needs.
Key Features
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Ultra-High Capacity (5000mAh): Offers 25% more capacity than standard 21700 cells (e.g., 40T), significantly extending the runtime of your devices.
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Stable 9.8A Continuous Discharge: Designed for moderate to high-drain applications without overheating or voltage sag, ensuring consistent performance.
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Up to 20A Pulse Discharge: Supports short bursts of high power, suitable for e-bike acceleration, power tool startup, or flashlight strobe functions.
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Authentic Samsung Quality: Premium-grade INR21700-50E cells with excellent cycle life, safety, and voltage stability.
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Flat Top Design: Standard flat top configuration, compatible with most battery holders, spring-loaded contacts, and DIY battery pack builds.
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2-Pack Value: Two independent cells, allowing you to build 1S, 2S, 3S, or parallel packs to achieve desired voltage or capacity.
Technical Parameters
Applications
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Electric Bikes (E-Bikes) / E-Scooters / E-Skateboards: Building or upgrading battery packs for longer range and extended ride times.
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High-Power Flashlights: Powering high-lumen tactical flashlights, searchlights, and headlamps for extended use.
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Portable Power Stations: Creating compact yet high-capacity battery banks for camping, emergency power, or off-grid applications.
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Power Tools: Retrofitting cordless drills, impact drivers, and rotary tools for longer work sessions.
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DIY Projects: Building custom 2S, 3S, 4S, or larger battery packs for robotics, drones, or solar storage.
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Outdoor & Camping Gear: Powering portable fans, heated jackets, and camping lights.
FAQ
Q1: Does '2Pack' mean it's a 2S battery pack assembled together?
A: No. "2Pack" means you will receive two separate individual cells. You will need to assemble them in series, parallel, or a specific configuration based on your device's requirements.
Q2: Can I use these batteries directly in my E-Bike?
A: A single 3.6V cell is not enough for an e-bike (which typically requires 36V, 48V, or 52V). You must build a battery pack using multiple cells wired in series. For a 48V e-bike, you typically need 13 cells in series (13S). Always consult a professional if you are unsure.
Q3: Does this battery have a protection circuit (PCB/BMS) built-in?
A: No. The Samsung 50E is an unprotected flat-top cell. It relies on the external device or a BMS (Battery Management System) to handle overcharge, over-discharge, and short-circuit protection.
Q4: What is the difference between Samsung 50E and 40T?
A: The 50E has a higher capacity (5000mAh vs 4000mAh) but lower continuous discharge (9.8A vs 35A). The 50E is best for long runtime, while the 40T is best for high power applications like power tools or heavy e-bikes.
Q5: What charger should I use?
A: Use a dedicated intelligent Li-Ion charger designed for 3.6V/4.2V cells. Ensure the charger supports the correct voltage for your specific pack setup (e.g., 1S charger for single cells, 2S charger for 2 cells in series).
Q6: How do I identify positive and negative terminals?
A: The flat top (the side with the Samsung logo and model number) is the Positive (+) terminal. The bottom (the side with the shiny metal casing and a slight indentation) is the Negative (-) terminal.
