Please note: Certain conditions may cause operation time to vary. Talk time spent on the phone, signal strength, flashing notification lights, screen time out and charging habits are a few conditions that may contribute towards the operational battery time. Full battery performance is achieved only after 2-3 charging and discharging cycles have been completed. It is recommended to fully drain and fully charge the battery especially during the first 3 charging and discharging cycles, doing so may greatly improve the overall life of the battery. Compatible with Huawei U2800A / M318