Come and see our amazing products. Portable Power Bank External Backup Battery Charger comes with a rechargeable Lithium-ion battery with a capacity of 2600mAh. It can be used as a quick booster for your smart phone's dying battery so that you can stay connected. The battery can handle up to 500 charge cycles, making it a long-lasting power bank. This power bank is designed to be used with your smartphone, MP3 and MP4 player, tablets and other portable devices. Custom logo is welcomed! Pls confirm with us about the packing info, stock color and exact production time before placing your order.