https://electronics.woot.com/offers...nergizer-2032-4-pack?ref=w_ngh_mc_itm_is_1_tl 4-Count Energizer CR2032 Batteries for $3.99. Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.