Dear Purchase Manager,
I'm daniela from Century sunshine of China, our factory is professional doing power bank, we produce many orders for our customer. Our battery quality is A grade.

Attached ten new items picture and price you may interested, for your question:
Looking forward to your earlier reply. Any more inquiry pls don't hesitate to contact us.

1Capacity: 5000mAh/3.7V(lithium polymer battery)
2Rating capacity: 18.5Wh
3Weight: about153G weight with packing: 160g
Input voltage: 5.5V>=0.5V
4Output voltage 5.5V>=0.5V
Max output electric current: 1000mA
5Max charging electric current: 800mA whole set with attachment weight815g
6Size: 110*70*16.5MM
7Charging time: 2-3hrs
8Input electricity: Charging from electricity adaptor, computer USB connector.
9Cycle Life: Over 500times
10Color: White, black