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Free shipping on all order above $49.99 to most countries.
Most flashlights can directly get 5 years warranty; battery and accessories get 1 year warranty.
Any questions, please email to info@sperasflashlight.com
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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.

Standard batteries die quickly in the cold. The LTH35 is engineered to maintain stable voltage and reliable output even in extreme freezing temperatures.
No dedicated battery charger needed. Plug a standard USB-C cable directly into the battery for fast, 1A convenient charging anywhere.
Supports a massive 10A maximum discharge current, providing stable and relentless power to high-lumen tactical flashlights without voltage sag.
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:
Why settle for generic batteries when your safety and visibility are on the line? See how the SPERAS LTH35 compares against industry standards.
| 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+) |
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.
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.
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.


