Lenovo TAB A8-50 Guide De Démarrage Rapide page 6

Charging and turning on/off your tablet
Before using your tablet, you might need to charge the battery.
Charge the battery as shown.
Method Connect your tablet to a power outlet using the included
cable and USB power adapter.
Low battery
For more information about battery safety, see the
Product Information
Fully charged
Guide.
Charging
Important