The failure could be related to the phone, the battery or the charger. Perform the following steps:
Make sure you are using dedicated battery and charger, which are compatible with your phone model.
Charge the battery as indicated in the user’s guide.
Take out the battery and put it back, following the instructions in the user’s guide.
If you have an extra-dedicated battery or charger compatible with your cell phone model, try to use them.
If the previously described options do not help, you can contact our hotline or repair center to get more professional technical assistance.