Professional Heated Vest Battery Pack30000mAh large-capacity battery pack for heated vest.The heated vest battery pack replacement has pocket size, ultra-compact, ultra-portable. It is handy and easy to put the battery for heated vest in your pocket or handbag. Smart Digital Display The advanced smart digital display technology shows the remaining power from 1% to 100%, ensuring you always know how much charge is left. The display lights up when connected and automatically sleeps when not in use to conserve power. Universal Compatibility This power bank's Type-C Port supports Input and Output. It's Multiple Input/output settings 7.4V 5V/3A, 9V/2A, 12V/1.5A. Suitable for all USB heated vests, as well as 3.8mm 4.0mm DC 7.4V heated vests. The USB port and Type-C port can charge phones and mobile devices.Please place the product in a stable and safe place to avoid falling or placing it under heavy objects. Perfect Spare Battery for Heated ClothingCompatible with m