Product Description:
Experience exceptional power delivery with the 18500 3.7V 1200mAh 3C High-Drain Li-ion Battery (2-Pack). Engineered for performance, this premium cylindrical cell features an ultra-low internal resistance of just 24±2mΩ. This exceptional engineering ensures minimal voltage sag and virtually no heat build-up even under intense 3C (3.6A) discharge loads, making it the ultimate choice for high-demand devices.
To accommodate different device architectures, we offer this high-performance cell in two terminal styles within this listing:
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Flat Top (50mm Height): Designed for flat contact plates or custom spot-welding into battery packs.
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Button Top (52mm Height): Features a raised positive terminal, perfect for spring-loaded compartments in flashlights and tactical gear.
CRITICAL SIZE & POWER WARNING:
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Size Alert: This is an 18500 battery with a large 18mm diameter. It will NOT fit standard 14mm (14500) or 16mm (16500) battery slots. The Flat Top version is 50mm high, and the Button Top version is 52mm high. Please measure your device's internal compartment diameter and depth before ordering.
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High-Drain Note: This is a 3C High-Drain cell. It is optimized for high-current output, not maximum long-term capacity. If you require extended runtime over raw power, please consider our 2000mAh 18500 variants.
Key Features:
Ultra-Low Internal Resistance (24±2mΩ): Minimizes power loss and heat generation during high-current discharges, providing crisp, consistent power to your devices.
Stable 3C (3.6A) High-Drain Output: Delivers reliable high-power bursts, perfect for motors, high-lumen LEDs.
1200mAh Optimized Capacity: Expertly balanced to offer excellent runtime without compromising the high-drain capabilities.
Dual Terminal Options: Choose between Flat Top (50mm) for spot-welding or Button Top (52mm) for spring-loaded compartments.
Convenient 2-Pack: Comes with two matched batteries, perfect for keeping a backup or powering dual-battery devices.
Parameters:
Applications:
High-Performance LED Flashlights & Tactical Torches
Cordless Power Tools & Small Motors (3.6A - 4A draw)
Custom Battery Pack Building (Flat Top required for spot welding)
High-Drain DIY Electronics & RC Models
FAQ:
Q: What is the advantage of the ultra-low 24mΩ internal resistance?
A: A lower IR means less power is wasted as heat. This battery will stay cool even during intense use, delivering maximum voltage to your device for a brighter flashlight .
Q: Why is the capacity 1200mAh instead of 2000mAh like other 18500s?
A: This battery is optimized for power output and low heat, not maximum runtime. By balancing the chemistry, we achieved a very low 24mΩ IR. If you need longer runtime, choose our 2000mAh version; if you need raw power, this is your battery.
Q: Is this battery compatible with my 14500 or 16500 device?
A: No. This is an 18500 battery with an 18mm diameter, which is much thicker than the 14mm (14500) or 16mm (16500) sizes. It will physically not fit into those slots.
Q: How do I choose between Flat Top and Button Top?
A: If your device uses flat metal contacts or you are spot-welding it into a pack, choose the Flat Top (50mm). If your device has a spring-loaded battery compartment (like most flashlights), choose the Button Top (52mm) to ensure a secure connection.
Q: Is this battery protected (with a PCB)?
A: No, this is a high-performance unprotected cell. It relies on your device's built-in protection circuit. Please use a dedicated 3.7V/4.2V Li-ion smart charger.
