Flexible　zinc-ion　batteries　have　garnered　significant　attention　in　the　realm　of　wearable　technology.　However,　the　instability　of　hydrogel　electrolytes　in　a　wide-temperature　range　and　uncontrollable　side　reactions　of　the　Zn　electrode　have　become　the　main　problems　for　practical　applications.　Herein,　N,N-dimethylformamide　(DMF)　to　design　a　binary　solvent　(H2O-DMF)　is　introduced　and　combined　it　with　polyacrylamide　(PAM)　and　ZnSO4　to　synthesize　a　hydrogel　electrolyte　(denoted　as　PZD).　The　synergistic　effect　of　DMF　and　PAM　not　only　guides　Zn2+　deposition　on　Zn(002)　crystal　plane　and　isolates　H2O　from　the　Zn　anode,　but　also　breaks　the　hydrogen　bonding　network　between　water　to　improve　the　wide-temperature　range　stability　of　hydrogel　electrolytes.　Consequently,　the　symmetric　cell　utilizing　PZD　can　stably　cycle　over　5600　h　at　0.5 mA　cm−2@0.5　mAh　cm−2.　Furthermore,　the　Zn//PZD//MnO2　full　cell　exhibits　favorable　wide-temperature　range　adaptability　(for　16000　cycles　at　3　A　g−1　under　25　°C,　750　cycles　with　98　mAh　g−1　at　0.1　A　g−1　under　-20　°C)　and　outstanding　mechanical　properties　(for　lighting　up　the　LEDs　under　conditions　of　pressure,　bending,　cutting,　and　puncture).　This　work　proposes　a　useful　modification　for　designing　a　high-performance　hydrogel　electrolyte,　which　provides　a　reference　for　investigating　the　practical　flexible　aqueous　batteries.　©　2024　Wiley-VCH　GmbH.