VIIGOOTECH&reg; Universal 3.7V 3600mAh Built-in Battery for 7" / 8" / 9" / 10" / 10.1" Tablet PC - Silver High quality lithium polymer battery Voltage: 3.7V Capacity:3600mAh Compatible Model: 7" / 8" / 9" / 10" / 10.1"and the larger size Compatible Brand: Universal