 The study presents a low-temperature anode-free potassium metal non-aquarius battery that utilizes cyo-based additives to enable uniform potassium deposition on a weak-solvation low-concentration electrolyte of 0.4 m-potassium hexafluorophosphate in 1,2-dimethoxyethane. The resulting KCU cells achieve an average plating stripping Coulombic efficiency of 99.8% at minus 40°C and full batteries with pre-potaciated 3,4,9,10,periline, tetracarboxylic acid, dienhydride achieve stable cycling with a high-specific energy of 152Whkg1 at 0.2 C, 26 mA G1, charge, discharge and minus 40°C. This article was authored by Meng Yao-Tang, Shui Dong, Zhou Wei-Wang, and others.