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

UltraFire 18650 2600mAh 3.7V Batteries (2-Pack) - With Protection Board

Name: UltraFire 18650 2600mAh 3.7V Batteries (2-Pack) - With Protection Board
Brand: UltraFire
SKU: 8588
Price: 27.99 USD
Availability: InStock

$27.99

SALE % OFF

Capacity:
2600mAh

Voltage:
3.7V

Charging Time:
5-7 hours

Free hipping

Easy Returns

1-Year Warranty

Specifications
FAQ
reviews

Brand

UltraFire

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Battery Type

18650

Title

Material

Li-ion

Title

Capacity

2600mAh

Title

Voltage

3.7V

Title

Maximum Discharge Current

4A-5A

Title

Charging Time

About 5-7 hours

Title

Size

46×10×10mm

Title

Weight

47g

Title

Chargeable

Yes

Title

Protective Case

Yes

Title

Certifications

CE, FCC, MSDS, UN38.8

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.