Power your headlights and everyday devices with the reliable 18650 Rechargeable Battery 3.7V 2000mAh 4A. This high-quality lithium-ion battery delivers a solid 2000mAh capacity with a stable 4A continuous discharge, offering dependable performance for headlights, flashlights, portable fans, toys, and a wide range of other battery-powered electronics. Whether you are hiking at night, working in low-light conditions, or simply replacing batteries in household gadgets, this 18650 cell provides the consistent energy you need. This listing offers both Button Top and Flat Top versions, giving you the flexibility to choose the right terminal type for your device. Compact, reliable, and rechargeable, this battery is an excellent value for everyday use.
Key Features
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2000mAh Reliable Capacity: Delivers 2000mAh of reliable energy, providing solid runtime for headlights and other medium-drain devices. Perfect for extended use without frequent recharging.
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4A Discharge Rate: Offers a stable 4A continuous discharge, suitable for headlights, flashlights, portable fans, and similar devices. Provides consistent performance for daily use.
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Button Top & Flat Top Available: Choose the right terminal for your device. Flat Top fits most modern headlights and DIY packs. Button Top is required for older devices and specific battery holders with spring-loaded contacts.
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Versatile Compatibility: Designed to work with headlights, flashlights, portable fans, toys, radios, clocks, and many other devices requiring 18650 batteries.
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Rechargeable & Eco-Friendly: Can be recharged hundreds of times, reducing waste and saving money compared to disposable batteries. Environmentally conscious choice for everyday power needs.
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Compact & Lightweight: Standard 18650 size ensures easy fit in a wide range of devices, from headlamps to small electronics.
Technical Parameters
Applications
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Headlights & Headlamps: Powering hiking headlamps, camping headlights, and work headlamps for outdoor activities and low-light work.
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Flashlights: Running tactical flashlights, everyday carry flashlights, and emergency flashlights.
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Portable Fans: Powering small desk fans, handheld fans, and camping fans for cooling comfort.
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Toys & Hobbies: Powering remote-controlled cars, drones, robots, and other electronic hobby toys.
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Home Electronics: Replacing batteries in remote controls, wireless keyboards, wall clocks, and other household devices.
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Radios & Communication: Operating portable radios, walkie-talkies, and emergency communication devices.
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DIY Projects: Building custom battery packs for robotics, Arduino projects, and other DIY electronics.
FAQ
Q1: What is the difference between Button Top and Flat Top?
A: Flat Top has a flat positive terminal, compatible with most modern headlights and DIY packs. Button Top has a raised positive terminal (like a standard AA battery), required for older devices and certain battery holders with spring-loaded contacts. Please select your desired version when placing your order.
Q2: What is the capacity of this battery?
A: This battery has a 2000mAh capacity (minimum 1900mAh), offering solid runtime for headlights and other medium-drain devices. It is a reliable choice for everyday use.
Q3: What does 4A mean?
A: 4A refers to the maximum continuous discharge current of this battery. This means it can safely deliver up to 4 amps of power continuously. This makes it suitable for headlights, flashlights, and portable fans, but not recommended for high-power applications like vaping or heavy power tools.
Q4: Is this battery suitable for my headlight?
A: Yes. This battery is an excellent choice for most headlights that require 18650 cells. Its 2000mAh capacity provides solid runtime, and its 4A discharge rate is sufficient for typical headlight power requirements. Please check your specific headlight's battery specifications before purchase.
Q5: Is this battery protected or unprotected?
A: This is an unprotected cell. It relies on your device's built-in BMS (Battery Management System) or protection circuit to handle overcharge, over-discharge, and short-circuit protection. This provides maximum flexibility for use in devices with built-in protection.
Q6: How many times can this battery be recharged?
A: This battery can be recharged approximately 800 times, depending on usage and charging habits. Proper care (using a quality charger, avoiding full discharge, and storing at moderate temperatures) will extend its lifespan.
Q7: What charger should I use?
A: Use a dedicated intelligent Li-Ion charger designed for 3.7V/4.2V cells. Do not use universal chargers designed for NiMH batteries. Look for chargers with overcharge protection and temperature monitoring features.
Q8: How do I identify positive and negative terminals?
A: The flat top (or the raised button on button top version) is the Positive (+) terminal. The bottom (the side with the shiny metal casing and a slight indentation) is the Negative (-) terminal.
Q9: How should I store this battery when not in use?
A: Store at a partial charge (around 40-60% capacity) in a cool, dry place away from direct sunlight and extreme temperatures. Do not store fully charged or fully depleted for extended periods.
