Product Description
Power your devices with reliable, long-lasting energy using the DMEGC 50E 21700 Battery 2 Pack (Model: 21700-50E). Engineered by DMEGC (Dongyang Magnetic Materials), a leading Chinese manufacturer of lithium-ion cells, this 21700 battery delivers an impressive 5000mAh capacity paired with a stable 15A continuous discharge (30A pulse). It strikes the perfect balance between high capacity and moderate power output, making it an excellent choice for applications that require both long runtime and decent current delivery—without the premium price tag of top-tier brands. Whether you are upgrading your e-bike battery pack, powering a high-lumen flashlight, or building a custom DIY power station, the DMEGC 50E offers reliable, safe, and cost-effective performance. 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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High Capacity (5000mAh): Provides 5000mAh of reliable capacity, significantly extending your device's runtime between charges.
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Moderate 15A Continuous Discharge: Delivers stable 15A continuous current, suitable for medium-drain devices like flashlights, e-bikes, and power tools. Supports up to 30A pulse discharge for short bursts of higher power.
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Balanced Performance: Offers a perfect middle ground between high-capacity low-drain cells (e.g., Samsung 50E at 9.8A) and high-drain lower-capacity cells (e.g., Samsung 40T at 35A).
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Cost-Effective Alternative: DMEGC cells provide excellent performance at a more accessible price point, making them a great choice for budget-conscious DIY enthusiasts.
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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: Supplied as two individual cells, allowing you to build a 2S series pack (7.2V), a 1S2P parallel pack (10000mAh), or replace worn-out cells in pairs.
Technical Parameters
Applications
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High-Power Flashlights & Headlamps: Powering high-lumen tactical flashlights, searchlights, and headlamps that require sustained brightness and reliable runtime.
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Electric Bikes (E-Bikes) / E-Scooters / E-Skateboards: Building or upgrading battery packs for light to medium-duty electric rides. Two cells can serve as a starter pack or replacement for worn-out cells.
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Power Tools: Upgrading cordless drills, impact drivers, and other handheld power tools for longer work sessions without the high cost of premium cells.
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DIY Battery Packs: Creating custom 1S2P, 2S1P, or 2S2P battery banks for robotics, drones, or portable power stations.
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Outdoor & Camping Gear: Powering portable fans, heated jackets, camping lights, and other outdoor electronics.
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Portable Power Stations: Building compact yet powerful battery banks for camping, emergency power, or off-grid applications.
FAQ
Q1: Does '2 Pack' mean it's a 2S battery pack assembled together?
A: No. "2 Pack" means you will receive two separate individual cells. You will need to assemble them in series (for 7.2V), parallel (for 10000mAh), or a specific configuration based on your device's requirements.
Q2: How does DMEGC 50E compare to Samsung 50E?
A: The DMEGC 50E offers the same 5000mAh capacity but provides a higher 15A continuous discharge compared to the Samsung 50E's 9.8A. This makes the DMEGC 50E more versatile, capable of handling medium-drain applications (e-bikes, power tools) that the Samsung 50E might struggle with. DMEGC is also generally more affordable.
Q3: Can I use these two cells to build a battery pack for my E-Bike?
A: A single 3.6V cell (or two cells) is not enough for an e-bike (which typically requires 36V, 48V, or 52V). Two cells can be combined in series to create a 7.2V pack, suitable for small devices like some flashlights or RC models. For an e-bike, you need many more cells wired in series. The DMEGC 50E is a great choice for light to medium e-bike packs due to its 15A discharge. Always consult a professional if you are unsure about building a pack.
Q4: Does this battery have a protection circuit (PCB/BMS) built-in?
A: No. The DMEGC 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.
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, etc.).
Q6: How do I identify positive and negative terminals?
A: The flat top (the side with the DMEGC 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.
Q7: Is DMEGC a reliable brand?
A: Yes. DMEGC (Dongyang Magnetic Materials) is a well-established Chinese manufacturer with significant experience in lithium-ion cell production. While not as globally recognized as Samsung or LG, their cells offer solid performance, good safety standards, and excellent value for money.
