21700 Flashlights

High-capacity 21700 batteries deliver higher output and longer runtime. Built tough for demanding use, ideal for outdoor, work, and tactical applications.

Category

BY BATTERY MODEL

18650

21700

14500

16340

26650

AA/AAA

15 products
 
31%

365NM | ZWB2 FILTER | 6.5 IN

Compact and powerful, the RUV3 delivers a true 365nm UV beam with a ZWB2 filter, dual modes, and 4.5-hour runtime—ideal for forensics, mineral checks, and scorpion hunting.

$67.99
$46.99
VIEW PRODUCT
34%

1500 LUMENS | ZOOMABLE | 550M

The UltraFire UF2 delivers 1,500 lumens, zoomable focus, and a durable, USB-C rechargeable design built for outdoor work and everyday carry.

$49.99
$32.99
VIEW PRODUCT
12%

365NM/395NM | 10W | 4.96 IN

The UltraFire RUV2 delivers 10W UV light, a durable aluminum body, and USB-C rechargeable portability—perfect for precision tasks, DIY projects, and outdoor use.

$33.99
$29.99
VIEW PRODUCT
30%

1200 LUMENS | 200M | 5.35 IN

The UltraFire UF3 is a compact, durable tactical flashlight delivering 1200 lumens and a 200-meter beam. Ideal for outdoor adventures, emergencies, and everyday carry.

$37.99
$26.59
VIEW PRODUCT
30%

1000 LUMENS | 200M | V6 LED

The UltraFire WF-502A is a 1000-lumen tactical LED flashlight with a 200-meter beam, 5 versatile modes, and a rugged, IPX4 water-resistant aluminum body—perfect for camping, EDC, emergencies, and outdoor adventures.

$19.99
$13.99
VIEW PRODUCT
0%

1400 LUMENS | 500M | 5.3OZ

The UltraFire S2 is a compact, rechargeable EDC flashlight delivering 1400 lumens with a 500-meter beam. Featuring a side switch with 8 modes, COB side light, IP65 waterproof/dustproof rating, and a built-in charging port, it’s ideal for work, outdoor tasks, and everyday use.

$22.99
VIEW PRODUCT
0%

850 LUMENS | 3 MODES | 18.89 IN

The UltraFire UF-806 is an 850-lumen traffic wand with 3 modes, lightweight build, and durable design—perfect for traffic control and emergency signaling.

$27.99
VIEW PRODUCT
31%

1800 LUMENS | 160M | 5.51 IN

The UF3 PRO delivers 1800 lumens in a rugged tactical design with dual switches for fast, reliable control—ideal for law enforcement, patrol, and outdoor use.

$57.99
$39.99
VIEW PRODUCT
22%

3350 LUMENS | 300M | PCV

The UltraFire UF-DIV13S delivers 3350 lumens with a 300 m beam, offering bright, clear illumination for cave diving, night exploration, and underwater photography.

$89.99
$69.99
VIEW PRODUCT
15%

619 LUMENS | Type-C | 6.3 IN

The UltraFire UF-805 is a USB-C rechargeable traffic wand flashlight (619 lumens) with IP68 waterproofing and rugged aluminum body—ideal for airports, traffic, and emergencies.

$45.99
$38.99
VIEW PRODUCT
0%

2500 LUMENS | 643M | 4.8 IN

UltraFire UF-H7 packs 2500 lumens in a compact, rechargeable body. Durable, water-resistant, and EDC-ready for any task or adventure.


$37.99
VIEW PRODUCT
0%

2500 LUMENS | 100M | 5 LED

The UltraFire ET28 is a 2500LM rechargeable flashlight with 5 LEDs, RGB modes, USB charging, IP67 waterproof, and compact, versatile lighting for any outdoor or emergency use.

$25.99
VIEW PRODUCT
30%

3100 LUMENS | 320M | 5.71 IN

Tough and tactical, the LR1 blasts 3,100 lumens with a 320-meter beam, dual-tail control, and USB-C rechargeable power — built to perform in any mission.

$99.99
$69.99
VIEW PRODUCT
0%

150000 LUMENS | 24 LED | 11.42 IN

The UltraFire V8 Apollo delivers 150,000 lumens, Type-C fast charging with discharging, and a heavy-duty, weather-resistant design built for extreme brightness and versatility.

$579.99
VIEW PRODUCT
12%

5200 LUMENS | 500M | 21700

The UltraFire TPG packs 5,200 lumens, multi-mode versatility, and a magnetic base into a tough, rechargeable flashlight built for everything—from camping and reading to emergencies and work lighting.

$67.99
$59.99
VIEW PRODUCT

Frequently asked questions

Have questions? We’re here to help

Title

Q1: ​​​​Can I use 18650 batteries in a 21700 flashlight?​​

A: Yes, with adapters. Most 21700 flashlights (e.g., ​​UltraFire UF-806​​) support 18650 cells, though runtime and brightness may drop by 15–20%.

Q2: ​​​​What makes 21700 better than 18650?​​

A: Higher capacity (​​5,000mAh vs. 3,500mAh​​), superior discharge rates (​​70A continuous​​), and longer lifespan (​​500+ cycles​​).

Q3: ​​​​Do they work as power banks?​​

A: Select models (e.g., ​​UltraFire UF2) include ​​USB-C power bank functionality​​ to charge phones or GPS devices.

Explore by UltraFire® Lighting Product Category

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