Attention Before Purchase: This Type C Heated Jacket Charger Cable converts 5V power from your QC 3.0 or PD function power bank into 12V, ensuring your heated jacket runs effectively . The heated jacket adapter cable only work with QC 3.0 Power Bank or PD function Power Bank. NOT work for old version power bank which USB outlet is 1.0A, 2.0A, 2.1A, 3A. | 12V Heated Jacket Step-up Adapter Cable allows you to use your own existing QC 3.0 or PD function power bank to power your heated jacket, offering a budget-friendly solution for your outdoor and work needs. This Magic Cable can be as Replacement Heated Jacket Battery Pack designed to work with a variety of milwaukee heated Jacket battery, milwaukee m12 extended battery, Snap-on heated jacket battery, Revean jacket battery, 12v tool batteries and 12V heat jacket battery. | Q001. Why your Jacket cannot work with this Cable? ? A001, This Type C Heated Jacket Charger Cable is designed to boost the output from your QC 3.0 or PD-enabled power bank from 5V to 12V. It only works with power banks that support QC 3.0 or PD functions. It will NOT work with older power banks that have 1.0A, 2.0A, 2.1A, or 3A USB outputs. If your jacket isn’t working, it’s likely because your power bank doesn’t support real QC 3.0 or PD charging. | Q002. Why your Jacket cannot work with this Cable?? A002, The Heated Jacket Charger Cable connector size of this cable is 5.5mm. If your jacket’s connector is 3.5mm or 4.0mm, This Type C Heated Jacket Charger Cable won’t fit, and the Step-up Adapter Cable won’t work with your heating jacket. (Most 7.4V or 8.4V heated jackets use 3.5mm or 4.0mm connectors, which are incompatible with this 12V heated jacket step-up cable.)