Nokia brand is well known for its battery life and time, the same is with Nokia Lumia 1020. A fully charged battery can provide a 13 hours of talk time. If the battery is providing backup support less than that, this battery means a weak or damaged battery. The battery may get harm due to water, liquid or fluid ingress, overheating, or expiry of its specified life. In case of a weak or non sync battery get it replaced by our technician at service centre JLT. We use genuine parts and ask for fare price.