3 / 122.3 Inserting and removing TF card2.4 Inserting and removing SIM3. Charging the battery Your mobile phone can monitor and display the batterystate. Normally the remaining energy of the battery is indicated bythe battery level icon at the upper right corner of the displayscreen. When the battery energy is insufficient, the mobile phoneprompts "Connect charger".Using a travel adapter: Install the battery into the mobile phone before charging thebattery. Connect the adapter of the travel charger with the chargingslot in the mobile phone. Ensure that the adapter is fully inserted.