Introducing our brand-new, top-of-the-line rechargeable battery. Compact, featherweight, and with lightning-fast charging capabilities, it recharges in just 4 hours when paired with the Micro-USB charger. This powerhouse 5000mAh battery delivers an impressive 10 hours of runtime, ensuring uninterrupted warmth for all your K7Wear heated vests and jackets. MINI 5000mAh BATTERY (CHARGER NOT INCLUDED)