BLU Studio 5.0 C D536U C775004180L Aksberry(R) 1800mAh High Capacity Li-ion Mobile Phone Battery Compatible Model: BLU Studio 5.0 C D536U C775004180L Brand new and high quality battery. Integrated microchip inside prevents overcharging and lengthens battery life. Use the authorized charger only. If you don't use the battery for a long time, please put it in a dry and cool place and make it full charged once every three months.