Description: Compatible with: DOOGEE X6 and DOOGEE X6 Pro smartphone Very suitable for your mobile phone, can solve the problem of mobile phone suddenly without electricity for you. Ii is the best choice for back-up power. Type: Li-Ion Output Voltage: 3.8V Charging voltage limit: 4.35V Capacity: 3000mAh Package Included: 1 x 3000mAh Battery for DOOGEE X6 X6 Pro