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Brands:TRANYOO Name:Mobile power Model:T-D09 Battery Type :lithium polymer battery Battery Capacity:20000mAh Input:Type-c: 5V/2A Output :USBA1/USBA2 : 5V/2A Weight:~375g Size:~146*73.3*28.5mm 1 x T-D08 Powerbank , 1 x USB Cable Where the power bank automatically detects your device’s specific charging requirements. The power bank delivers the appropriate charging voltage to your device, which means a safer and more efficient charge every single time. Additionally, this power bank comes with built-in safeguards that protect your device against overcharging, overheating, and short circuits.