21700 Charger
Premium 21700 Batteries & Smart Chargers
A high-performance tactical or search flashlight is only as reliable as its power source. The 21700 lithium-ion battery has become the gold standard in the professional illumination industry, offering significantly higher capacity and discharge rates compared to traditional 18650 cells.
At SPERAS, we design power solutions built for extreme environments. Whether you need a cold-weather resistant battery that won't die in freezing temperatures, or a fast dual-slot smart charger to keep your gear ready for duty, our power accessories ensure your flashlights perform at peak output when you need them most.
Why Trust SPERAS Power Solutions?
- Built-In Protection: Our batteries feature integrated protection circuits against overcharge, over-discharge, and short-circuiting for maximum safety.
- Extreme Weather Ready: Specialized cells designed to maintain stable voltage even in sub-zero outdoor conditions.
- Efficient Recharging: Modern Type-C USB charging technology ensures fast, safe, and universal power delivery.
Essential Power Accessories
SPERAS LTH45 21700 Battery
4500mAh Low-Temperature Power
Standard lithium batteries fail in the cold. The LTH45 is specifically engineered to conquer freezing environments, providing stable, high-drain power for your tactical and hunting flashlights when the temperature drops.
Shop LTH45 Battery →SPERAS Dual-Slot Smart Charger
Universal Type-C USB Charging
Keep your gear fully powered and ready for action. This smart charger features two independent slots and a convenient Type-C USB input. It automatically detects battery status and selects the optimal charging mode for safe, fast power.
Shop Smart Charger →Frequently Asked Questions (FAQ)
Why are 21700 batteries better for high-lumen flashlights?
The 21700 battery is slightly larger than the older 18650 standard, allowing for a significant increase in capacity (like the 4500mAh in our LTH45) and a higher continuous discharge rate. This is absolutely essential for modern tactical and search flashlights that require massive power to sustain outputs of 3000 to 10,000 lumens.
Do regular lithium batteries work in freezing weather?
Standard lithium-ion batteries suffer from severe voltage drops and capacity loss in sub-zero temperatures, often causing flashlights to shut off unexpectedly. If you are hunting, camping, or working in winter conditions, you need a specialized Low-Temperature Lithium Battery like the SPERAS LTH45, which is formulated to perform reliably in extreme cold.
Can I charge 21700 batteries with a standard phone charger block?
Yes! The SPERAS Dual-Slot Battery Charger utilizes a universal Type-C USB input. This means you can plug the charging cable into standard wall adapters, power banks, car chargers, or solar panels, making it incredibly versatile for travel and outdoor use.
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Vendor:SPERAS
SPERAS 21700 dual-slot Type C-USB battery charger
The SPERAS ZL21 is a portable dual-slot Type C-USB battery charger with each single slot max output of 1A, available for large-sized 21700, 18650 Lithium batteries and Capable of charging 2 batteries simultaneously and controlling each slot. Specification Input DC 5V/2A Output Voltage...- $12.69
- $12.69
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Vendor:SPERAS
SPERAS LTH45 4500mAh 21700 Low Temperature Lithium Battery Black
Extreme Environment Power Cell SPERAS LTH45 21700 Battery – 4500mAh Cold Resistant Power 🔋 Designed for extreme environments, the SPERAS LTH45 Lithium Battery delivers reliable performance even in freezing conditions. Compared to standard 21700 lithium batteries, it performs up to 3× better at -40°C/°F,...- $28.99
- $28.99
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