Andlova Flat Seven (b7) is a lightweight portable battery power supply designed for small pedalboards. The overall dimensions is very close to an iPhone Pro except a bit thicker. Featuring a built-in 3.7V/10,000mAh rechargeable lithium battery, the b7 allows you to rock your favourite pedals all day long without having that 60Hz noise from the wall. The 5V DC USB out also let you charge your phones and tablets. 

The b7 has seven 9V DC outputs. 6 of them deliver 100mA each, and one delivers 300mA for pedals that require higher current. It takes roughly 6 to 6.5 hours to fully charge the b7 and the battery will last:

• 4.5 hours for 900mA load (maximum output)
• 8 hours for 500mA load
  
• 20 hours for 200mA load
• 40 hours for 100mA load

For reference:

• Tubescreamer overdrive current draw = 8mA
  
• MXR Carbon Copy delay current draw = 26mA
  
• Chase Bliss Tonal Recall delay current draw = ~150mA
• Typical analog pedal current draw = 20~60mA
• Typical digital pedal current draw = 150~300mA

Each output is regulated for quiet operation. They also have their own independent protection circuits so that in case you accidentally short one of the outputs, rest assure it will not affect the others and all your other pedals will be safe. 

Ports and controls:

On the right side:

• Power on/off rocker switch + operation indicator LED
  
• USB-C charging port + charging/full charge indicator LED
  
• Low battery indicator LED
• USB 5V DC out
  

On the bottom side:

• 5.5/2.1mm barrel 9V DC output x 7 (BOSS Type centre negative)
  
• 9V DC output status indicator LED x 7
  

Dimensions and weight:

• 142mm x 76.5mm x 16.5mm (5.59" x 3.02" x 0.65")
  
• 297g (0.65 lb)