[to translate] It is common practice with mobile phone manufacturers to test all phones in laboratories and to then publish the results. These tests are performed with the phone switched on, without any manipulations, under good network reception conditions, in other words optimal conditions. The measurements obtained reflect the maximum performance of the product, thus providing a benchmark, enabling it to be compared to other models and brands.
When you use a mobile phone, you will not always have perfect reception, you move around, you use Bluetooth or Wifi, and you use it to communicate, but maybe as well to listen to the radio or to take pictures with it etc. All of these factors and others affect the battery life time per charge.
It's also important to know that a battery will not obtain its full performance until after a few recharges.
Do not hesitate to contact us for any additional information.