Electronics circuits - Battery Status Monitor by ICM7555 The low power LED flasher by ICM7555 Normally, when you need to use LED display status of the battery 6V-12V. Just add a resistor
MAX16834 High-Power LED Driver with Integrated High-Side LED Current Sense and PWM Dimming MOSFET Driver | Maxim Integrated
Ultra low power LED | Hackaday.io
Fairchild Semiconductor's New Low-Power LED Drivers with Integrated MOSFETs Help Designers Reduce Board Space and Design Times — LED professional - LED Lighting Technology, Application Magazine