High-Capacity 3.7V 4000mAh Li-Polymer Battery Pack
Premium lithium-polymer construction ensures lightweight durability and stable power output. Ultra-thin design with reinforced casing for safe, long-lasting performance in extreme conditions. Ideal for heated jackets, gloves, and wearable tech—providing consistent warmth for outdoor sports, winter workwear, and adventure gear. Built-in protection against overcharge, short-circuit, and overheating. Direct bulk pricing for global suppliers—lowest wholesale rates guaranteed. Compatible with most USB-powered heating systems, ensuring versatile plug-and-play use.