Product review (1 stars): Unit doens't work with Lithium batteries
Unit worked fine for some days.  When outside temp dropped below 60 degrees at night the display read -40/99%.  Could reproduce by putting remote sensor in the fridge.  Called  AcuRite Tech Support who said I can't use Lithium batteries in the display at all.  Lithium batts  are only allowed in the remote unit and only when temps are below zero.  The 1.7v new Lithium's put out are enough to make their devices malfunction.

Since I converted from alkaline to lithium battery's some time ago and am not going back, this means this product is unusable for me.  Lithium  batteries are no longer rare and unheard of.  The product description should specify that it is a alkaline only device when it can't work with newer technology.