18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
UltraFire_HIGH_DRAIN_LI-ION_RECHARGEABLE_BATTERY_1 - UltraFire
UltraFire_HIGH_DRAIN_LI-ION_RECHARGEABLE_BATTERY_1 - UltraFire
Continuous_Discharge_Current_1 - UltraFire
Continuous_Discharge_Current_1 - UltraFire
Internal_Safety_Features_1 - UltraFire
Internal_Safety_Features_1 - UltraFire
Purpose-designedHigh-performanceProtectedCircuit - UltraFire
Purpose-designedHigh-performanceProtectedCircuit - UltraFire
Mercury_Free_Lead_Free_and_Cadmium_Free - UltraFire
Mercury_Free_Lead_Free_and_Cadmium_Free - UltraFire
Safe_and_Reliable_1 - UltraFire
Safe_and_Reliable_1 - UltraFire
Low_Cost_and_Environmentally_Friendly_1 - UltraFire
Low_Cost_and_Environmentally_Friendly_1 - UltraFire
1-Year_Free_Warranty - UltraFire
1-Year_Free_Warranty - UltraFire
18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
UltraFire_18650_2600mAh_3.7V_5.2A_Batteries_4-Pack - UltraFire
UltraFire_18650_2600mAh_3.7V_5.2A_Batteries_4-Pack - UltraFire

UltraFire 18650 2600mAh 3.7V 5.2A Batteries (2/4-Pack) - With Protection Board

$20.99
$29.99
SALE 30% OFF

Features

High-drain 18650 li-ion battery with protection board. CE, FCC, MSDS, UN38.8 certified for safe and reliable use.

Free Shipping 

Easy Returns

1-Year Warranty
Included

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

Customer Reviews

Based on 8 reviews
88%
(7)
13%
(1)
0%
(0)
0%
(0)
0%
(0)
J
Jason Short
Jason Short

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

J
John Jones

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

M
Mason
That's right

It's not fake

I
IG
Solid Build Quality

Solid build quality and reliable protection board. I wish they were a bit lighter for easier portability.

e
ewe
Good Performance

Good performance overall. The batteries with protection board work well, but the capacity could be slightly higher.

12

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.
18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
UltraFire_HIGH_DRAIN_LI-ION_RECHARGEABLE_BATTERY_1 - UltraFire
Continuous_Discharge_Current_1 - UltraFire
Internal_Safety_Features_1 - UltraFire
Purpose-designedHigh-performanceProtectedCircuit - UltraFire
Mercury_Free_Lead_Free_and_Cadmium_Free - UltraFire
Safe_and_Reliable_1 - UltraFire
Low_Cost_and_Environmentally_Friendly_1 - UltraFire
1-Year_Free_Warranty - UltraFire
18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
18650 2600mAh 3.7V Rechargeable Batteries (2-Pack) - With Protection Board - UltraFire
UltraFire_18650_2600mAh_3.7V_5.2A_Batteries_4-Pack - UltraFire

UltraFire 18650 2600mAh 3.7V 5.2A Batteries (2/4-Pack) - With Protection Board

SALE 30% OFF