Description

Armytek 21700 Li-Ion 5000 mAh Battery with PCB (Protected)

The Armytek 21700 Li-Ion 5000 mAh battery with PCB protection is a high-capacity rechargeable lithium-ion battery designed for powerful flashlights and high-drain electronic devices. The integrated protection circuit improves operational safety and allows efficient use even with high-performance lighting equipment.

The 21700 battery format provides increased runtime and higher discharge capability compared to many traditional battery formats, making it especially suitable for modern high-output flashlights and demanding portable electronics.

This protected version supports discharge currents up to 17A and combines high energy capacity with reinforced construction and advanced safety systems.

Key Features

• Rechargeable Li-Ion 21700 battery
• 5000 mAh high-capacity design
• Integrated PCB protection circuit
• High discharge current up to 17A
• Protection against short circuit
• Protection against overcharge
• Protection against overdischarge
• High-quality battery cells and components
• Steel reinforced bottom construction
• Dual field-effect transistor protection system
• Safety vents with thermal cut-off protection
• Designed for powerful flashlights and high-drain devices
• Up to 500 charge/discharge cycles
• Expected operational life up to 5 years

Aim of the Product

This battery is designed to provide safe, stable and long-lasting rechargeable power for high-output flashlights and compatible high-drain electronic devices using 21700 Li-Ion batteries.

Audience

Suitable for professional flashlight users, tactical users, rescue personnel, industrial users, outdoor enthusiasts and anyone requiring high-capacity rechargeable power solutions.

Applications

• Professional flashlights
• High-output tactical lighting
• Outdoor and expedition equipment
• Industrial portable electronics
• Emergency and backup lighting systems
• Compatible 21700-powered devices

Product Use

The battery should only be used with compatible devices and chargers designed for protected 21700 lithium-ion batteries.

Always observe device polarity markings and manufacturer charging instructions. Use only suitable lithium-ion charging equipment.

Specifications and Technical Details

Care and Maintenance

• Use only compatible lithium-ion chargers
• Store in cool and dry conditions
• Do not expose the battery to water or fire
• Keep battery contacts clean
• Avoid repeated full discharge whenever possible
• Inspect batteries regularly for physical damage

Safety Information

• Use only with compatible devices and chargers
• Do not short circuit battery terminals
• Do not disassemble or puncture the battery
• Do not expose to excessive heat or direct flame
• Stop use immediately if swelling, overheating or leakage occurs
• Keep away from children
• Dispose of batteries according to local recycling regulations

Other Useful Information

The 21700 battery format is increasingly popular in modern high-performance flashlights due to its ability to provide higher runtime and increased current output compared to older battery standards.

The integrated PCB protection system improves user safety and helps protect devices against electrical faults and improper battery conditions.

The reinforced construction and dual transistor protection design improve durability and reliability under demanding operating conditions.

Glossary of Terms

• Li-Ion: Lithium-ion rechargeable battery technology
• 21700: Cylindrical battery format with high energy capacity
• PCB protection: Electronic safety circuit integrated into the battery
• Overdischarge: Excessive battery discharge that may damage battery cells
• MOSFET: Electronic transistor used in battery protection systems

FAQ

Manufacturer & Contact Information

Armytek GmbH
Jonasstr. 6
Berlin
Germany

Customer service is supported through authorized dealers, including Lynxgear store.