For best results, we recommend using fresh batteries when setting up your La Crosse Technology devices. To make sure that you are using the freshest batteries possible, always check the expiration dates on your batteries. For Alkaline batteries, you want the expiration year to be at least 7-8 years in the future. All Alkaline batteries have a date put on them, from the day they are produced, to reflect the 10-year expiration date.
Lithium batteries are significantly stronger, so they are only recommended for cold weather use (when the temperatures outside reach 0 degrees or lower and will continue to remain that way for an extended period). Lithium batteries are recommended for the outdoor sensors ONLY.
We do NOT recommend using Lithium or Rechargeable batteries in your indoor display unit.