Hi Mit_1. Sorry to hear you weren’t able to find the battery type and size on the Kmart.com lantern product description page. I was unable to find the type and size myself and attempted to call my local Kmart to ask for the specifications but the product is out of stock. I will try additional Kmart locations and reply with any additional information I am able to dig up for you! Please stay tuned and also feel free to call your local Kmart or nearby locations to ask for this info!