This is a high-capacity (50000mAh) battery, confirmed to work with the 2025 Workman "Peltier Vest (PRO2 / WindCore)". It maximizes cooling performance and supports long operation even in the hot summer for outdoor work, outdoor activities, events, etc. It uses a lithium-ion battery and is designed for high output and durability. It is highly recommended as a replacement, as genuine products are currently difficult to obtain. PSE certified (indicated on the main unit), with safety in mind. Also, it has a compact design that fits perfectly in the vest's battery pocket and does not hinder movement during work. ⸻ 【Product Specifications】 ・Size: Approximately 10.2cm (length) x 7.1cm (width) x 2.9cm (thickness) ⸻ 【Estimated Theoretical Operating Time (when using 50000mAh)】 This product has approximately 2.5 times the capacity of a conventional 20,000mAh battery, allowing for long-term use as follows. ※This is a theoretical value and may vary depending on the actual usage environment. 〈ICE MODE (Cooling)〉 ・5 full operation mode (strong): Approximately 7.0 hours ・5 full operation mode (weak): Approximately 10.75 hours ・5 full operation mode (fluctuation): Approximately 8.25 hours ・5 full operation mode (small 4 devices): Approximately 10.75 hours ・Back 3 mode (strong): Approximately 11.25 hours ・Back 3 mode (weak): Approximately 16.25 hours ・Back 3 mode (fluctuation): Approximately 13.0 hours ・Back 3 mode (small 4 devices): Approximately 21.5 hours 〈HEATER MODE (Heating)〉 ・5 full operation mode (strong): Approximately 18.5 hours ・5 full operation mode (weak): Approximately 44.25 hours ・Back 3 mode (strong): Approximately 30.75 hours ・Back 3 mode (weak): Approximately 61.5 hours ⸻ 【Information】 ・Instant purchase OK ・New and unopened ・Please refrain from price negotiations ⸻ 【Compatible Products/Usage Scenarios】 #Workman #WORKMAN #PeltierVest #PRO2 #WindCore #AirConditioningVest #CoolingVest #FanWear #Workwear #SummerWear #HeatstrokePrevention #OutdoorWork #ConstructionSite #Farming #WarehouseWork #Fishing #MotorcycleCommuting #Camping #Festivals #PSECertification #Battery ⸻ ※Due to being an imported product, there may be minor dents on the outer box, but the main unit is new and unopened.