Portable electronic devices, including cell phones, media players, and digital cameras, are now ubiquitous and play an important role in people’s daily lives. As longer battery life can make a portable device standout in the market immediately, selecting the right battery system is one of the most important factors in the device design process. This application note is intended to assist portable electronic product designers and engineers in selecting the right battery chemistry for today’s low-cost portable applications, taking into account the importance of design simplicity. The solutions are ideal for use in space-limited and cost-sensitive applications that can also accelerate the product time-to-market rate.