SPERAS LTH35 Low Temperature High Performance 18650 Lithium Battery 3500mAh

Premium Power Supply

SPERAS LTH35: 3500mAh High Capacity 18650 Rechargeable Li-ion Battery

Designed for use in freezing conditions, the SPERAS LTH35 battery is threefold more effective than standard 18650 cells at -40°C (-40°F). Featuring a substantial 3500mAh capacity and a built-in USB-C port, it is the ultimate energy supply for demanding tactical and outdoor applications.

The LTH35 is designed to flawlessly power high-drain devices. It is the perfect, factory-recommended upgrade and replacement battery for the following premium SPERAS flashlight models:

• SPERAS EST  
• SPERAS EST2  USB-C Rechargeable Tactical Flashlight
• SPERAS EST PLUS V2 Professional Search Light 
• SSPERAS M4 Type-C Rechargeable EDC Flashlight 
• SPERAS SH18 2000lm Right-Angle Flashlight & Headlamp 

Key Specification	SPERAS LTH35	Generic 18650	Other Premium Brands (Nitecore/Fenix)
Capacity	3500mAh (True Capacity)	Typically 2600 - 3000mAh	3400 - 3500mAh
Cold Resistance	Extreme (-40°C / -40°F)	Poor (-10°C limit)	Standard (-20°C limit)
Direct USB-C Charging	✅ Yes Built-in	❌ No	Varies (Often Micro-USB or None)
Price Tier	High Value	Cheap	Premium Pricing ($20+)

Model	LTH35
Battery Type	3.6V 18650 Lithium-ion Battery
Battery Capacity	3500mAh / 12.6Wh
Input Charging	1A / USB-C Direct Port
Continuous Output Current	5A
Max Output Current	10A
Working Temperature	-40°C ~ 60°C
Dimensions	Length: 69.43mm | Diameter: 18.4mm
Net Weight	50g
Warranty	1 Year (Contact us for fast exchange/replacement)

Do I need an external battery charger to charge the LTH35?

No! One of the best features of the SPERAS LTH35 Rechargeable Li-ion Battery is its built-in USB-C port. You can plug a standard Type-C cable directly into the side of the battery to charge it, making it perfect for travel and camping.

Why is the -40°C cold resistance important?

Standard lithium-ion batteries lose a massive amount of their capacity and discharge capability when temperatures drop below freezing, often dying completely. The SPERAS LTH35 is engineered with specialized chemistry to maintain stable voltage down to -40°C, ensuring your flashlight works when you need it most in winter conditions.

Can I use this 18650 battery in non-SPERAS flashlights?

Yes. As long as your device accepts standard "button-top" 18650 batteries and supports a 69.4mm length (which accounts for the built-in protection and USB-C circuitry), the SPERAS LTH35 will provide exceptional high-drain performance.