Have tried so far all kinds hand warmer (carbon rods, gasoline, battery). Had I but immediately bought these gloves. Already from 8 degrees cold fingers (Raynaud) and get it then no longer 'defrosted'. These gloves make it. You are at the highest level hot immediately and can already after 15 minutes at level 2, be switched back according to the outside temperature on stage 1. then the battery lasts approx.4,5 hrs., on the hottest stage immerhin1,5. That's enough for a dog walk and cold early morning in a cold car. Dressed alone can with the gloves still "grab", the heating does improve with an extra pair. Prefer the gloves early at relatively warm temperatures, as prophylaxis, and had barely cold fingers. Great product. We recommend.
