These slides use concepts from my (Jeff Funk) course entitled Biz Models for Hi-Tech Products to analyze the business model for a bio-battery. Bio-batteries store energy with organic compounds often with glucose. Because glucose has ten times the theoretical energy density as does li-ion batteries, there is a high potential for bio-batteries. Already dramatic improvements have been made in this energy density. We recommend that firms initially target implants such as pacemakers. The bio-compatibility of bio-batteries can reduce the frequency of battery replacements, which are expensive and non-trivial. Other potential markets include the military, electric vehicles, and portable devices.