
This book describes the field of State-of-Charge (SoC) indication for rechargeable batteries. An overview of the state-of-the-art of SoC indication methods including available market solutions from leading semiconductor companies is provided. All disciplines are covered, from electrical, chemical, mathematical and measurement engineering to understanding battery behavior. This book will therefore is for persons in engineering and involved in battery management.

Battery Status
The battery meter has 10 LEDS that will light to show the battery condition. When fully charged, only the 10th LED will light shown a green LED.
As the battery discharges, successively lower LEDs will light; the 9th, 8th, 7th and so on lighting only 1 LED.
At approximately 30% battery life, the #3 LED will light and the color is Yellow as a caution indicator.
At approximately 20% battery life remaining, the #2 LED will light as a Flashing Yellow.
When the battery discharges to approximately ~10% remaining life, the #1 LED will start FLASHING RED with the #2 LED FLASHING Yellow alternately.

Samsung Droid Charge i510 Extended Capacity 3600mAh Li-Ion Battery + Battery Door Cover ~ Mobile Phone Repair Parts Replacement