We have featured many excellent power banks, but if you need a small and larger capacity option to charge your MacBook, the fresh BatteryBox portable battery pack should be more suitable for you.
The BatteryBox is a high performance, large capacity power bank that measures 0.98 x 2.63 x 3.55 inches and weights 8.81 oz. As shown in the images, the battery pack features minimal and compact design for portability, and comes with a 12000mAh backup battery in order to provide enough juice for 12 hours of a MacBook Air, 6 hours of MacBook Pro, or 8 iPhones. Moreover, the backup battery also features a unique BatteryOS technology that allows BatteryBox to last 3000 full charge and discharge cycles and still retain 96% of capacity after 5 years. After the break, take a look at the following demo video first.
The BatteryBox portable battery pack is priced at $139.95 USD. If you need it, jump to BatteryBox official site for detailed introduction.