This circuit is simple and easy to build and can be used in cars to monitor the battery status. It uses an IC LM3914
12V Lead Acid Battery Voltage Monitor Using LM3914 Bargraph Driver
Simple Electronic Circuits - LM3914 12V Battery Monitor Circuit This bar graph LED battery level indicator circuit is based on LM3914 monolithic IC from National Semiconductor that senses the voltage levels of
LM3914 battery level indicator - Electronic Circuit
What are good ways to make a battery level indicator without the use of LM3914? - Quora
Car battery tester with LM3914 under Automotive Circuits -6812-
Battery Charge Monitor Circuit with LM3914 IC - Electronics Area
Solved Need help creating a LM3914 IC for multisim in order
Dot/Bar Display Driver Hookup Guide - SparkFun Learn
Dot/Bar Display Driver Hookup Guide - SparkFun Learn
Car battery monitor using LM3914
Simple Voltage Indicator with LEDs Bargraph - Share Project - PCBWay
Sound level meter circuit using IC LM3914 - Gadgetronicx