High-Capacity, Reliable Power with 21700 Lithium-Ion Batteries
21700 batteries provide exceptional energy storage, higher current output, and extended runtimes for high-drain devices. Their larger size allows for greater capacity while maintaining stable, consistent voltage — making them ideal for powerful torches and work lights that require sustained performance.
Key Benefits of 21700 Batteries
21700 lithium-ion cells offer superior energy density, fast recharging capabilities, and built-in safety features such as overcharge protection, short-circuit prevention, and thermal management. Many models also feature onboard USB-C charging for added convenience.
Perfect for a Wide Range of Applications
21700 batteries are ideal for high-output torches, tactical searchlights, professional work lights, headlamps, diving lights, power tools, portable lighting setups, and emergency kits. Their increased capacity makes them highly suited for extended shifts, outdoor expeditions, and demanding worksite use.
Key Factors to Consider When Choosing 21700 Batteries
• Capacity: Larger mAh ratings offer significantly longer runtimes compared to smaller formats.
• Voltage: Most operate at 3.6V or 3.7V — confirm compatibility with your device.
• Protection circuit: Protected models offer safety against overcharging, overheating, and short-circuits.
• Rechargeability: Hundreds of safe charge cycles ensure excellent long-term value.
• Charging system: USB-C, onboard ports, or external chargers depending on your charging preference.
• Brand compatibility: Always select batteries recommended for your torch model to ensure maximum performance.
Maintenance Tips for Long-Term Battery Performance
• Avoid full discharges whenever possible to maximise lifespan.
• Store batteries in a cool, dry place when not in use.
• Use only manufacturer-approved chargers to maintain battery health and safety.
• Regularly inspect batteries for swelling, damage, or corrosion.
Warranty and Support
All 21700 batteries include full Irish warranty coverage, fast dispatch on in-stock items, free shipping on orders over €150, and a 30-day returns policy for complete peace of mind.