21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
UltraFire_HIGH_DRAIN_LI-ION_RECHARGEABLE_BATTERY_12 - UltraFire
UltraFire_HIGH_DRAIN_LI-ION_RECHARGEABLE_BATTERY_12 - UltraFire
Continuous_Discharge_Current_9 - UltraFire
Continuous_Discharge_Current_9 - UltraFire
Internal_Safety_Features_5 - UltraFire
Internal_Safety_Features_5 - UltraFire
Purpose-designedHigh-performanceProtectedCircuit - UltraFire
Purpose-designedHigh-performanceProtectedCircuit - UltraFire
Mercury_Free_Lead_Free_Cadmium_Free_8 - UltraFire
Mercury_Free_Lead_Free_Cadmium_Free_8 - UltraFire
Safe_and_Reliable - UltraFire
Safe_and_Reliable - UltraFire
Low_Cost_and_Environmentally_Friendly_2 - UltraFire
Low_Cost_and_Environmentally_Friendly_2 - UltraFire
1-Year_Free_Warranty - UltraFire
1-Year_Free_Warranty - UltraFire
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire
21700 5000mAh 3.7V Rechargeable Batteries (2-Pack) - UltraFire

UltraFire 21700 5000mAh 3.7V 10A Batteries (2-Pack) - Protected

$30.99
SALE % OFF

Features

High-drain rechargeable 21700 li-ion battery with protection board. CE, FCC, MSDS, UN38.8 certified for safe and reliable use.

Free Shipping 

Easy Returns

1-Year Warranty

Specifications

Brand

UltraFire
Title

Battery Type

21700 Rechargeable Battery
Title

Material

Li-ion
Title

Capacity

5000mAh
Title

Voltage

3.7V
Title

Max Continuous Discharge

10A
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Energy

18.5 Wh
Title

Rechargeable

>1000 cycles
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Size

36.5mm x 16.7mm
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Weight

70g
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Chargeable

Yes
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Protective Case

Yes
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Certifications

CE, FCC, MSDS, UN38.8

Reviews

Customer Reviews

Based on 2 reviews
100%
(2)
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(0)
0%
(0)
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(0)
L
Luke
Great battery!

It holds a charge well, recharges quickly, and delivers strong, reliable power every time.

E
Edmund Kelley
Battery

Best flash light I ever had

FAQ

Frequently asked questions

Q1: Is the 21700 battery safe to use?

Yes, our 21700 batteries come with a built-in protection board and are CE, FCC, MSDS, and UN38.3 certified for safe and reliable use.

Q2: How do I charge and maintain a 21700 battery?

Use a compatible charger designed for lithium-ion batteries. Avoid overcharging or exposing the battery to extreme heat, and store it in a cool, dry place when not in use.

Q3: How long does a 21700 battery last?

With proper use and charging, a 21700 battery can last for hundreds of charge cycles, providing long-lasting and reliable performance.