Voltaic Converter 5.5W Solar V25 Battery Backpack [Battery Type: V25 (6,400mAh)]

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Never leave home unprepared again with the Converter Solar Backpack. Designed with high efficiency, matte black SunPower solar panels, this solar powered backpack keeps your phone and other USB devices charged wherever the day takes you.

  • Included USB Battery Pack
  • 20L of storage
  • Padded 15" laptop/tablet sleeve
  • Made from 21 recycled plastic bottles (Recycled PET Fabric)



  • Easy-access, 20L main compartment with interior mesh pockets for organization; dedicated side pocket for charging small electronics
  • Charges your phone as fast as it charges at home using industry-leading SunPower high efficiency (22%) solar cells
  • Fabric made from recycled PET (plastic soda bottles) is waterproof, lightweight and UV resistant
  • Fully padded laptop/tablet sleeve holds most 15" laptops and 10" tablets
  • High density molded back section and breathable mesh shoulder harness for ultimate comfort

ITEM: B1036


Size and Weight

  • Dimensions: 45.7 x 30.5 x 15.2 cm
  • Total Weight: 1.09 kg (Includes Battery)

Solar Panel

  • 5.5 Watts at 6 Volts
  • Waterproof, UV-resistant ETFE coating
  • Monocrystalline cells - 20% Efficient

V25 USB Battery Option

  • Capacity: 6,400mAh, 25 Watt Hours
  • Dual USB Output: 5V/2A, 3A Max USB
  • MicroUSBInput: 5-6V/2A
  • USB-C Input: 5V/2A
  • Battery Type: Li-Ion
  • Protection: Short Circuit, Over Charge, Over Discharge, Over Current, Over Temperature
  • Weight: 160 grams
  • Safe for air travel (Carry-on Luggage Only)

V50 USB Battery Option

  • Capacity: 12,800mAh, 47 Watt Hours
  • Output: 5V/2A , 3A max (2 outputs)
  • MicroUSB Input: 5-6V/2A
  • USB-C Input: 5V/2A
  • Battery Type: Li-Ion
  • Protection: Protection: Short circuit over charge, over discharge, over temperature, under temperature
  • Weight: 272 grams
  • Safe for air travel (Carry-on Luggage Only)


  • Converter Solar Backpack
  • USB Battery Pack
  • USB - MicroUSB Charging Cable
Brand Voltaic


Charges all USB Devices including all Apple, Android, Google, and Blackberry smartphones.

Charges all tablets that are powered by USB including Apple iPads and Samsung Tablets. Will not charge tablets that charge at 12 or 16 Volts such as a Microsoft Surface.

Digital Cameras:
Charges both DSLRs and cameras that charge from USB. For DSLRs, an optional camera charger cradle that matches your camera battery is required. Read our tutorial on solar camera charging.

Device Charge Times

Device V25 Battery Smartphones DSLR Cameras 7" Tablers 10" Tablets
Number of Charges from Battery - 1.8 1.6 1.0 0.5
Hours to Charge from Solar Panel* 4.0 3.5 5.0 6.7 12.0

*Based on good solar charging conditions.

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