Eric Steen I reside in Nebraska and it receives definitely chilly listed here, these preserve my fingers warm and these actually maintain me pleased. AA batteries allow it to be a breeze. But there really should be Instructions on the actual vest. Otherwise, talk to the maker’s Site. But https://whatisthebestheatedvestto52616.pointblog.net/the-definitive-guide-to-heated-vest-how-to-charge-74847854