Total Members Voted: 49
I found the proper battery..................https://www.amazon.com/EmazingLights-CR2020-volt-Lithium-Batteries/dp/B01HOVJ0S0/ref=sr_1_5_a_it/166-8783763-6409931?ie=UTF8&qid=1482859037&sr=8-5&keywords=battery+2020Do you think the book would sell more than 20 copies?