Specification:

• Type: USB 9V 1000mah rechargeable battery
• Charging method: Only Micro USB Cable
• Material: lithium battery
• Standard voltage: 9V
• Built-in battery capacity: 1000mAh
• Built-in battery energy: 3.7WH
• Size: 48x26x16mm
• Product weight: about 30g
• Charging time: about 2 hours
• Self-discharge current: 20uA
• Cycle times: 1500 times

Notice : Because the battery uses a boost circuit, it will cause interference in the audio equipment, and there will be weak noise and current sound.