​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.​

Batteries

Powering Performance with Reliability

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

 
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18650 2600mAh 3.7V Rechargeable Batteries (2/4-Pack) - UltraFire
18650 2600mAh 3.7V Rechargeable Batteries (2/4-Pack) - UltraFire

UltraFire 18650 2600mAh 3.7V Batteries (2/4-Pack)
$19.99
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Sale -163% off
18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire

UltraFire 18650 2600mAh 3.7V Batteries (2-Pack) - With Protection Board
$20.99
$7.99
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18650 3000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
18650 3000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire

UltraFire 18650 3000mAh 3.7V Batteries (2-Pack)
$22.99
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18650 3000mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
18650 3000mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire

UltraFire 18650 3000mAh 3.7V Batteries (2-Pack) - With Protection Board
$23.99
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18650 3000mAh 3.7V Pro Rechargeable Batteries (2-Pack) - UltraFire
18650 3000mAh 3.7V Pro Rechargeable Batteries (2-Pack) - UltraFire

UltraFire 18650 3000mAh 3.7V Pro Batteries (2-Pack)
$25.99
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18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire

UltraFire 18650 3400mAh 3.7V Micro-USB Battery (2-Pack)
$33.99
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21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire

UltraFire 21700 5000mAh 3.7V Batteries (2-Pack)
$30.99
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26650 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
26650 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire

UltraFire 26650 5000mAh 3.7V Batteries (2-Pack)
$39.99
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10440 500mAh 3.7V Rechargeable Batteries (2/10-Pack) - UltraFire
10440 500mAh 3.7V Rechargeable Batteries (2/10-Pack) - UltraFire

UltraFire 10440 500mAh 3.7V Batteries (2/10-Pack)
$15.99
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14500 1200mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
14500 1200mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire

UltraFire 14500 1200mAh 3.7V Batteries (2-Pack)
$16.99
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16340 880mAh 3.6V Rechargeable Batteries (2-Pack) - UltraFire
16340 880mAh 3.6V Rechargeable Batteries (2-Pack) - UltraFire

UltraFire 16340 880mAh 3.6V Batteries (2-Pack)
$17.99
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17670 1800mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
17670 1800mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire

UltraFire 17670 1800mAh 3.7V Batteries (2-Pack)
$18.99
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18350 1200mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
18350 1200mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire

UltraFire 18350 1200mAh 3.7V Batteries (2-Pack)
$16.99
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18650 1800mAh 3.7V Rechargeable Batteries (2/4-Pack) - UltraFire
18650 1800mAh 3.7V Rechargeable Batteries (2/4-Pack) - UltraFire

UltraFire 18650 1800mAh 3.7V Batteries (2/4-Pack)
$15.99
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18650 2200mAh 3.7V Rechargeable Batteries (2/4-Pack) - UltraFire
18650 2200mAh 3.7V Rechargeable Batteries (2/4-Pack) - UltraFire

UltraFire 18650 2200mAh 3.7V Batteries (2/4-Pack)
$18.99
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Sale 50% off
AA 2800mAh 1.5V Alkaline Batteries (2-Pack) - With Protection Board - UltraFire
AA 2800mAh 1.5V Alkaline Batteries (2-Pack) - With Protection Board - UltraFire

UltraFire AA 2800mAh 1.5V Alkaline Batteries - With Protection Board (10-Pack)
$9.99
$19.99
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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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