Battery operated applications need to last longer for convenience, environmental and cost reasons. At the same time, applications become more and more complex and demand higher performance of the microcontroller, making the challenge of designing systems for low power even more difficult. With an energy consumption many times lower than any other microcontroller family today, whether you benchmark with leading 8, 16 or 32 bit microcontrollers, the EFM32 Gecko microcontrollers obtain battery lifetime in the 20-25 year range while providing the high performance of the 32-bit ARM Cortex-M3. Read this paper to learn more.