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"These batteries last longer than expected! Real 2600mAh capacity and they hold up well even after heavy use."

- John Jones

"UltraFire's 18650 batteries are the real deal—solid performance and reliable power every time. Definitely no fake capacity here."

- JasonShort

UltraFire 18650 Rechargeable Battery 2600mAh

Name: UltraFire 18650 Rechargeable Battery 2600mAh
Brand: UltraFire
SKU: 8588
Price: 20.99 USD
Availability: InStock
Rating: 4.5 (10 reviews)

2600mAh | 3.7V 5.2A | Protected

The UltraFire 18650 Battery 2600mAh delivers 3.7V, 4–5A discharge, and built-in protection, providing safe, high-performance, rechargeable power for flashlights and outdoor gear.

$20.99

$0.00

SALE % OFF

Free Shipping

Easy Returns

1-Year Warranty

Included

2PCS

Features

UltraFire High-Drain 18650 Li-ion Battery
Built-in protection board ensures safe performance and longer lifespan.
Certified by CE, FCC, MSDS, and UN38.8, meeting international safety and quality standards.
Trusted by professionals worldwide, UltraFire batteries deliver reliable power, durability, and peace of mind for your everyday and tactical needs.

Specifications

Brand

UltraFire

Title

Battery Type

18650

Title

Material

Li-ion

Title

Capacity

2600mAh

Title

Voltage

3.7V

Title

Max Continuous Discharge

5.2A

Title

Energy

9.62 Wh

Title

Charging Time

About 5-7 hours

Title

Cycle Life

500+ full charges

Title

Size

68.3mm×10mm×10mm

Title

Weight

46g

Title

Chargeable

Yes

Title

Protective Case

Yes

Title

Certifications

CE, FCC, MSDS, UN38.8

Reviews

Good 18650 batteries.

The shipping was fast. The batteries are in good condition, recharge easily and work very well.

Have not received the batteries yet.

Where are my batteries?

Hi, we’re really sorry for the delay. Sometimes batteries go through extra customs checks, which can slow down delivery. We appreciate your understanding and sincerely apologize for the inconvenience.

Jason Short

UltraFire's 18650 batteries are the real deal—solid performance and reliable power every time. Definitely no fake capacity here.

These batteries last longer than expected! Real 2600mAh capacity and they hold up well even after heavy use.

That's right

It's not fake

1 2

FAQ

Frequently asked questions

Q: Are these UltraFire 18650 batteries tested for safety before shipping?

A: Yes. Every UltraFire 18650 cell undergoes rigorous in-house and third-party testing to ensure compliance with international safety standards. We test for overcharge, over-discharge, short-circuit protection, and temperature stability. Each battery is also subject to capacity and cycle-life verification to guarantee consistent performance.

Q: What kind of protection does the built-in protection board offer?

A: The integrated protection board safeguards against common battery risks. It prevents:

Overcharge: Stops charging automatically when the cell reaches maximum voltage (4.2V).

Over-discharge: Cuts output if voltage falls below a safe threshold (around 2.5V), which helps extend battery life.

Short-circuit: Shuts down output immediately if a direct short is detected, reducing fire or damage risk.

Overcurrent/Overload: Limits excessive discharge currents to avoid overheating or cell rupture.

Q: Do these batteries carry any certifications?

A: Absolutely. Our UltraFire 18650 2600mAh cells are manufactured under ISO 9001 quality management processes and meet the following certifications:

IEC 62133 for portable battery safety.

UN 38.3 for safe air transport.

RoHS (Restriction of Hazardous Substances) compliant.

CE marking for European conformity.
You can request copies of test reports or certification documents when placing bulk orders.

Q: How can I be sure these batteries won’t overheat or catch fire?Can other infor be added to an invoice?

A: Several layers of protection reduce the risk of overheating:

High-quality cell chemistry (gradematched Li-ion materials) that resists thermal runaway.

Built-in PCM (Protection Circuit Module) to prevent overcurrent and short circuits.

Stringent quality control during production: every cell’s internal resistance and voltage variance are checked.

Thermal testing: cells are subjected to simulated high-temperature environments to verify stability. When used with a compatible charger and within recommended operating parameters, the chance of overheating is extremely low.

Q: What should I do if a battery becomes swollen or shows signs of damage?

A: Do not use or charge a swollen or physically damaged battery. Immediately remove it from the device/charger and isolate it in a fireproof container (e.g., a metal or ceramic box). Contact UltraFire customer support for instructions on safe disposal. Swelling indicates internal cell failure, which can pose a safety hazard.