UltraFire Batteries – 18650 Battery Rechargeable, Li Ion Batteries & 21700 Power Solutions

​Explore our premium rechargeable battery collection featuring AA, 18650, 26650 lithium-ion packs, and 3.7V cells. Get extended runtime, 2000+ cycles, and UL-certified safety for home, industrial, and outdoor use.​

Powering Performance with Reliability

UltraFire batteries are engineered for high-demand applications, from tactical flashlights to industrial devices.

UltraFire 18650 Battery 2600mAh 3.7V – Unprotected, high-drain rechargeable Li-ion cell with 4–5A discharge. Compact, lightweight, and reliable for flashlights, headlamps, and electronics.

$25.99
$19.99
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Reliable and long-lasting, the UltraFire 18650 Battery 2600mAh delivers 3.7V, 4–5A max discharge, and built-in protection for safe, high-performance power. Rechargeable over 1500 times, available in 2- or 4-pack for flashlights, gadgets, and outdoor gear.

$29.99
$20.99
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UltraFire 18650 Battery 3000mAh 3.7V – Unprotected Li-ion rechargeable cells (2-pack) with reliable long-lasting power, 0.2–0.5C discharge, CE/FCC/MSDS/UN38.8 certified for safe everyday use.



$30.99
$22.99
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UltraFire 18650 Battery 3000mAh 3.7V – Protected Li-ion cells with PCB safety, 500+ recharge cycles, high-capacity 3000mAh for long-lasting power in LED flashlights and high-drain devices.

$31.99
$23.99
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High-capacity and durable, the UltraFire 18650 Pro Battery 3000mAh delivers 3.7V, 6A max discharge, and built-in protection—rechargeable over 1500 times. Pack of 2, perfect for flashlights, headlamps, and high-drain devices.

$25.99
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Reliable and convenient, the UltraFire 18650 Battery 3400mAh delivers 3.7V, 6.8A max current, and built-in protection, with USB recharge for flashlights, cameras, and other high-drain devices.

$33.99
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UltraFire 21700 5000mAh 3.7V Battery – High-drain Li-ion cells with protection board, 10A output, rechargeable 1000+ cycles, and CE/FCC/MSDS/UN38.8 certified for safe, reliable power.

$41.99
$30.99
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Powerful and reliable, the UltraFire 26650 Battery 5000mAh delivers 3.7V, high discharge current, and over 1500 recharge cycles—perfect for flashlights, headlamps, and high-drain devices. Pack of 2, protected and certified for safe use.

$39.99
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UltraFire 10440 3.7V 500mAh rechargeable Li-ion batteries with protection. Compact, safe, and reliable for small flashlights and gadgets.

$15.99
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UltraFire 14500 3.7V 1200mAh rechargeable Li-ion batteries with protection. Compact, safe, and reliable for flashlights and everyday electronics.

$21.99
$16.99
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UltraFire 16340 3.6V 880mAh rechargeable Li-ion batteries with protection. Compact, safe, and reliable power for flashlights, gadgets, and portable electronics.

$17.99
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UltraFire 17670 3.7V 1800mAh Rechargeable Battery – Protected Li-ion cells with overcharge/discharge safety, long-lasting power, and 500+ cycles.

$18.99
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UltraFire 18350 1200mAh 3.7V Battery (2-Pack) – Compact, lightweight Li-ion rechargeable cells with 3.7V output, 1200mAh capacity, and CE/FCC/MSDS/UN38.8 certified for safe, reliable power.

$16.99
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UltraFire 18650 Battery 1800mAh 3.7V – High-performance Li-ion cell with 3A max discharge, 500+ recharge cycles, compact, lightweight, and CE/FCC/MSDS/UN38.8 certified.

$18.99
$15.99
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UltraFire 18650 Battery 2200mAh 3.7V – Rechargeable Li-ion cell with 4.4A max discharge, 500+ cycles, CE/FCC/MSDS/UN38.8 certified, reliable, compact, and ideal for flashlights and electronics.

$0.00
$17.99
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UltraFire AA 2800mAh 1.5V Alkaline Batteries (10-Pack) – Long-lasting, high-performance power for toys, remotes, flashlights, and everyday devices.

$19.99
$9.99
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UltraFire High-Performance Rechargeable Batteries | Reliable Power for Flashlights, Tools & Critical Devices

Engineered for Demanding Use: Extended Cycle Life, Multi-Device Compatibility & Advanced Safety Systems

A. Battery Engineering

Cell Chemistry: Li-ion optimized for stable discharge curves (flat 3.7V output until 90% depletion)

Model Matrix:
10440 500mAh Mini flashlights, laser pens
16340 800mAh Compact EDC lights
18650 1800-3400mAh High-lumen torches
21700 5000mAh Long-range search lights
26650 5000mAh Extended outdoor use

B. Safety & Longevity

Overcharge defense: Precision PCB cuts off at 4.25V±0.05V

Thermal management: Nickel-plated steel casing dissipates heat 30% faster than standard cells

Cycle life optimization: 80% capacity retention after 500 cycles (lab-tested)

Frequently asked questions

Have questions? We’re here to help

Title

Q1: How do I choose between 18650 vs 21700 batteries?

A: Consider runtime needs and device size:
• 18650: Compact (18mm diameter) for 2-4hr high-power use
• 21700: Larger (21mm) for 5-8hr runtime – ideal for all-night operations

Q3: What’s the safe way to store spare batteries?

A: Keep at 40-80% charge in fireproof containers. Our anti-corrosion terminals resist oxidation for 18+ months storage (tested at 77°F/60% humidity).

Q5: How many times can I recharge them?

A: Achieve 1000+ cycles by avoiding full discharges.

Explore by UltraFire Lighting Product Category

Choose a lighting category to shop our extensive catalog of lighting products and accessories.

Tactical Flashlights

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EDC Flashlights

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UV Lights

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Hunting Lights

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Batteries

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