Product Description
Power your outdoor adventures and everyday devices with the DMEGC 45E 21700 Cells 2Pcs (Model: 21700-45E). Manufactured by DMEGC (Dongyang Magnetic Materials), a leading Chinese lithium-ion cell producer, these 21700 batteries deliver a solid 4500mAh capacity with a stable 10A continuous discharge (20A pulse). Perfectly suited for flashlights, camping gear, and other low-to-medium drain applications, the DMEGC 45E offers a reliable, cost-effective alternative to premium brands like Samsung. Whether you are powering a high-lumen searchlight for night hiking, running a portable fan at your campsite, or building a custom DIY battery pack for outdoor electronics, these cells provide consistent, safe, and long-lasting energy. This listing includes two individual cells (not pre-assembled), giving you the flexibility to configure them in series or parallel for your specific needs.
Key Features
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High Capacity (4500mAh): Offers 4500mAh of reliable capacity, providing extended runtime for your devices, especially during long outdoor trips or extended use sessions.
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Stable 10A Continuous Discharge: Delivers a consistent 10A continuous current, ideal for flashlights, headlamps, camping fans, and other medium-drain outdoor gear. Supports up to 20A pulse discharge for short bursts of higher power.
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Long Runtime Focus: Optimized for devices that need to run for hours or days without recharging, making it an excellent choice for camping, hiking, and emergency preparedness.
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Cost-Effective Alternative: DMEGC cells offer reliable performance at a more accessible price point, making them a great choice for budget-conscious DIY enthusiasts and outdoor lovers.
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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 (9000mAh), 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 used for night hiking, camping, and emergency situations.
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Camping & Outdoor Gear: Running portable camping fans, LED lanterns, heated jackets, and other outdoor electronics for extended periods.
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Emergency Preparedness: Building backup power banks or powering emergency lights, radios, and other essential devices during power outages or natural disasters.
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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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Light-Duty Power Tools: Powering small cordless tools like screwdrivers, mini drills, or other handheld devices with moderate power requirements.
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Portable Power Stations: Building compact battery banks for camping, off-grid living, or emergency power backup.
FAQ
Q1: Does '2Pcs' mean it's a 2S battery pack assembled together?
A: No. "2Pcs" means you will receive two separate individual cells. You will need to assemble them in series (for 7.2V), parallel (for 9000mAh), or a specific configuration based on your device's requirements.
Q2: How does DMEGC 45E compare to Samsung 50E?
A: The DMEGC 45E offers a slightly smaller capacity (4500mAh vs 5000mAh) but has a similar continuous discharge rating (10A vs 9.8A). The main advantage of DMEGC 45E is its lower price point, making it a great budget-friendly alternative for users who don't need the full 5000mAh capacity.
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 45E's 10A discharge is suitable for very light e-bikes (low power), but not for high-performance models. Always consult a professional if you are unsure.
Q4: Does this battery have a protection circuit (PCB/BMS) built-in?
A: No. The DMEGC 45E 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.
Q8: Is this battery suitable for vaping?
A: No. The DMEGC 45E's 10A continuous discharge is not sufficient for high-power vaping (which typically requires 20A or higher). For vaping applications, we recommend cells with higher discharge ratings, such as Samsung 40T (35A) or Samsung 50S (25A). Using this cell for vaping could result in overheating and safety risks.
