Product Description
This listing offers authentic XTAR 21700 5000mAh 10A high-capacity lithium-ion rechargeable batteries (available in 1 or 2-piece packs). Engineered with a strict commitment to "True Capacity, No False Labeling," this battery delivers a colossal 5000mAh (18000mWh) of genuine power with a 3.6V nominal voltage and a 4.2V charging cut-off. It supports a stable 10A continuous discharge current, making it an outstanding power source for high-performance tactical flashlights and moderate-power electronic cigarettes. Featuring a built-in high-strength dual-stainless steel protection board, it effectively prevents overcharging, over-discharging, and overcurrent damage. Remarkably, it maintains a capacity loss of less than 20% even after 500 recharge cycles. The button-top design ensures perfect electrical contact with mainstream high-drain devices. Whether you need a spare or a pair, choose the pack size that suits your needs.
Key Features
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True 5000mAh Capacity, No False Labeling: Delivers an uncompromised, measurable 5000mAh real capacity (18000mWh) with a 3.6V rated voltage.
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Reliable 10A Continuous Discharge: Provides a stable 10A continuous discharge current without significant voltage drops. Ideal for high-performance flashlights and 10A-rated electronic devices.
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Integrated High-Strength Stainless Steel Protection Board: Built-in stainless steel casing with an integrated PCB to prevent overcharge, over-discharge, and overcurrent, ensuring exceptional safety and durability.
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500 Cycle Long Lifespan: Engineered to retain over 80% of its original capacity even after 500 full charge/discharge cycles, far surpassing ordinary batteries that typically degrade by 40%.
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Button Top Positive Terminal: Features a button-top design for secure, reliable electrical contact with high-performance tactical flashlights, headlamps, and portable electronics.
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Flexible Quantity Options: Available in 1 or 2-piece packs, allowing you to perfectly match your daily usage or device-pairing needs.
Product Parameters
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Brand: XTAR
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Model: 21700 Rechargeable Li-ion Battery
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Nominal Capacity: 5000mAh (18000mWh)
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Nominal Voltage: 3.6V
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Charging Cut-off Voltage: 4.2V
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Max Continuous Discharge Current: 10A
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Protection Board: Built-in Dual Stainless Steel PCB (Overcharge, Over-discharge, Overcurrent Protection)
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Positive Terminal: Button Top
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Weight: 71g
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Dimensions: 21.5 ± 0.3mm (Diameter) x 74.5 ± 0.5mm (Height)
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Cycle Life Performance: Capacity loss less than 20% after 500 cycles.
Applications
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High-performance tactical flashlights, searchlights, and heavy-duty outdoor headlamps.
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High-power camping lanterns, portable survival gear, and emergency lighting equipment.
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Reliable power supply for portable radios, intercoms, and outdoor communication devices.
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(Note: Due to the built-in protection board and button-top design, this battery is designed for single-device use in consumer electronics. It is NOT suitable for DIY spot-welding into custom battery packs).
Frequently Asked Questions (FAQ)
Q1: What are the available pack options for this battery?
A1: You can purchase this battery in 1 or 2-piece packs. Please select the desired quantity from the variant options before checkout.
Q2: What does the 5000mAh capacity mean for my flashlight?
A2: 5000mAh is an extremely high capacity for a single cell. It provides roughly double the runtime of a standard 2500mAh 18650 battery, allowing your high-lumen flashlight to run for much longer periods before needing a recharge.
Q3: Is this battery protected and safe to use?
A4: Yes. It features a built-in high-strength stainless steel dual protection board that safeguards the battery against overcharging, over-discharging, and overcurrent damage, making it extremely safe for daily use.
Q4: How should I charge this protected 21700 battery?
A5: It is highly recommended to use a professional smart charger (such as XTAR chargers that support 21700 sizes) with full safety protections to charge this 3.6V battery to its 4.2V cut-off voltage. Avoid charging it directly inside devices that lack proper charge-control circuitry.
