AolsteCell Battery X5-1STGEN for Fiio X5, X5 1st Gen

• Voltage: 3.8V
• Capacity: 5000mAh

AolsteCell Battery X3-1STGEN for Fiio X3, X3K, X3 1st Gen, X3 1st Generation

• Voltage: 3.7V
• Capacity: 4500mAh

AolsteCell Battery X1-1STGEN for Fiio X1, X1 1st Gen, X1 1st Generation

• Voltage: 3.7V
• Capacity: 3000mAh

AolsteCell Battery X7 for Fiio X7, X7 II, X7 III

• Voltage: 3.7V
• Capacity: 3500mAh