18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
UltraFire_HIGH_DRAIN_LI-ION_RECHARGEABLE_BATTERY_6 - UltraFire
UltraFire_HIGH_DRAIN_LI-ION_RECHARGEABLE_BATTERY_6 - UltraFire
Continuous_Discharge_Current_4 - UltraFire
Continuous_Discharge_Current_4 - UltraFire
Internal_Safety_Features_4 - UltraFire
Internal_Safety_Features_4 - UltraFire
Purpose-designedHigh-performanceProtectedCircuit - UltraFire
Purpose-designedHigh-performanceProtectedCircuit - UltraFire
Mercury_Free_Lead_Free_Cadmium_Free_3 - UltraFire
Mercury_Free_Lead_Free_Cadmium_Free_3 - UltraFire
SafeandReliable_4 - UltraFire
SafeandReliable_4 - UltraFire
Low_Cost_and_Environmentally_Friendly_5 - UltraFire
Low_Cost_and_Environmentally_Friendly_5 - UltraFire
1-Year_Free_Warranty - UltraFire
1-Year_Free_Warranty - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
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 6.8A Micro-USB Battery (2-Pack) - Protected

$33.99
SALE % OFF

Features

High-capacity 3400mAh Li-ion batteries with built-in protection for safety and reliability. Supports 6.8A continuous discharge, 500+ charge cycles, and convenient Micro-USB or dock charging. CE, FCC, MSDS, and UN38.8 certified for peace of mind.


Choose UltraFire for dependable power—perfect for flashlights, outdoor gear, and everyday use.

Free Shipping 

Easy Returns

1-Year Warranty

Specifications

Battery Type

18650 Rechargeable Li-ion
Title

Voltage

3.7 V
Title

Max Continuous Discharge

6.8A
Title

Capacity

3400 mAh
Title

Energy

12.58 Wh
Title

Cycle Life

500+ full charges
Title

Charging Port

Micro-USB / Charger Dock
Title

Protection Circuit

Built-in (overcharge, short-circuit)
Title

Operating Temp

-20°C to 60°C (-4°F to 140°F)
Title

Weight

50g
Title

Size

71 ± 0.3mm, Diameter: 18.4 ± 0.3mm
Title

Protective Case

Yes
Title

Certifications

CE, FCC, MSDS, UN38.8

Reviews

Customer Reviews

Based on 2 reviews
100%
(2)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
J
Jeffrey Schlossberg
Thank you!:-)

nice new charging feature built in to battery. works great. Thanks!

m
mua cicada
good

nice good

Thank you for your kind words and support! We truly appreciate your positive feedback on our UltraFire brand. We are committed to delivering
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
UltraFire_HIGH_DRAIN_LI-ION_RECHARGEABLE_BATTERY_6 - UltraFire
Continuous_Discharge_Current_4 - UltraFire
Internal_Safety_Features_4 - UltraFire
Purpose-designedHigh-performanceProtectedCircuit - UltraFire
Mercury_Free_Lead_Free_Cadmium_Free_3 - UltraFire
SafeandReliable_4 - UltraFire
Low_Cost_and_Environmentally_Friendly_5 - UltraFire
1-Year_Free_Warranty - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
UltraFire_HIGH_DRAIN_LI-ION_RECHARGEABLE_BATTERY_6 - UltraFire
Continuous_Discharge_Current_4 - UltraFire
Internal_Safety_Features_4 - UltraFire
Purpose-designedHigh-performanceProtectedCircuit - UltraFire
Mercury_Free_Lead_Free_Cadmium_Free_3 - UltraFire
SafeandReliable_4 - UltraFire
Low_Cost_and_Environmentally_Friendly_5 - UltraFire
1-Year_Free_Warranty - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
18650 3400mAh 3.7V Rechargeable Micro-USB Battery (2-Pack) - UltraFire
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 6.8A Micro-USB Battery (2-Pack) - Protected