How do know if my lenovo b590 is fully charged (100%) without turning it on?

[Jursto]

When I plug my laptop into AC to charge the battery, is there an indicator to show that the battery is fully charged without turning it on?

 

[jarotech]

In the user guide, on page 5 :

Power and battery status indicator

• Green: The battery charge level is between 80% and 100%, or the battery discharge level is between 20% and 100%.
• Slow blinking green: The battery charge level is between 20% and 80%, and charging is continuing.
When the battery charge level reaches 80%, the battery status indicator stops blinking, but the charging
might continue until the battery is 100% charged.
• Slow blinking orange: The battery charge level is between 5% and 20%, and the charging is continuing.
When the battery charge level reaches 20%, the blinking color changes to green.
• Orange: The battery discharge level is between 5% and 20%.
• Fast blinking orange: The battery charge or discharge level is 5% or less.
• Off: The battery is detached or the computer is powered off.