Hand Warmers & Power Banks

Your Certified OEM Manufacturer for 2-in-1 Hand Warmers & Power Banks

Stay warm and stay charged. HONVENJA is a premium manufacturer of innovative rechargeable hand warmers and power banks in Shenzhen, China. By combining fast-heating thermal technology with reliable portable charging, our 2-in-1 devices are the ultimate winter essential and a top-tier corporate gift.

We supply high-quality, safety-certified battery products to consumer electronics brands, outdoor gear retailers, and promotional gift distributors worldwide.

Why Source Hand Warmer Power Banks from HONVENJA?

• Dual-Purpose Efficiency (2-in-1): A perfect combination of a double-sided electric hand warmer and a high-speed USB power bank, providing instant warmth and emergency backup power for smartphones.
• Uncompromising Battery Safety: Safety is non-negotiable. We strictly use premium, A-grade lithium-ion/polymer batteries. Our smart IC chips provide comprehensive protection against overcharging, over-discharging, over-voltage, and short circuits.
• True Capacity Guarantee: No fake specs. We offer genuine battery capacities (e.g., 5000mAh, 10000mAh) to ensure long-lasting heating times and reliable device charging.
• Fast & Adjustable Heating: Engineered with rapid-heating elements that reach optimal temperatures in seconds, featuring multiple adjustable heat levels to suit user preferences.
• The Perfect Winter Corporate Gift: Highly desirable for holiday promotions. We offer full OEM/ODM services: custom Pantone colors, laser-engraved or silkscreen logos, and premium gift box packaging to showcase your brand.
• Complete Global Certifications: Fully compliant for global sales and shipping. Our products hold CE, FCC, RoHS certifications, and crucially, MSDS and UN38.3 reports for safe battery transportation.

Power up your winter product line. Explore our 2-in-1 hand warmers below and contact our factory for wholesale pricing or customized OEM gift solutions.