Solio CLASSIC2 (2012) Battery Pack + Solar Charger Review


With our increasing dependence on electronic devices, it's comforting to know that there are some companies out there that are dedicated to making sure that your device is always available.  Anything that can be charged by USB interface could now have potentially unlimited power, even when you're miles away from the nearest outlet. The Solio CLASSIC2 Battery Pack + Solar Charger will keep your GPS, phone, avalanche beacons, or other USB-chargeable devices at at the ready with some sun and a little time, and beyond a convenience factor, might be a literal life-saver.


Boasting twice the capacity of our previous CLASSIC model, a day of sun gives you three complete charges on your portable electronic devices. The CLASSIC2 now features a full-sized USB port allowing thousands of devices to easily connect, just by using their dedicated charging cable.

The CLASSIC’s iconic design has been updated to be slimmer, while larger solar panels allow for faster solar charging. So what are you waiting for? Go green in style with the Solio CLASSIC2!

Anything -Simply connect to the Classic using your device’s own USB charging

Anytime -Holds charge for up to a year. The Classic will give most smartphones
three complete charges.

Anywhere -Charge the Classic from the Sun, USB port, or the wall.



Simple, Fast Charging

The CLASSIC2 1Amp USB output charges target devices at the same rate as a typical wall charger. Popular smartphones go from empty to full in just under 90 minutes. Since most devices these days charge by USB, it's more simple than ever to Plug Into the Sun™.


Sundial for Energy Capture

The ingenious design of the Solio CLASSIC2 allows a pencil to be inserted into a central pivot point to make it possible to track the sun like a sundial. Simply point the CLASSIC2 towards the sun and rotate it until the pencil no longer casts a shadow. Adjust the position of the CLASSIC2 each time the pencil casts a shadow for maximum solar capture efficiency. A full day in full-sun completely charges the battery.


Charge When the Sun Goes Down

When the sun goes down, the CLASSIC2 battery can be re-charged via the micro-USB port. From USB power, the 3200mAh battery charges in 6 hours.


Compact for Travel

When the CLASSIC2 is not spun open to capture energy from the sun, it slides into a compact package that fits in the palm of your hand. At only 10.1 ounces, the CLASSIC2 easily tucks into a backpack or messenger bag and provides battery back up for a multitude of small electronics while on-the-go.


One Button Does it All

The Solio CLASSIC2 has a single LED push button. When the CLASSIC2 is capturing energy, the LED button lights up RED. Push the button one time and the CLASSIC2 flashes slowly 1 to 5 times to indicate battery level. Next it begins to flash rapidly to indicate power output. Depress the button one more time to turn off the power. 




  • Charge-In: Micro-USB

  • Charge-Out: USB


Max Wattage: 5 Watts

Discharge Rate: Fixed 5V, 1,000mA

Charge Rate: 5-5.5V 450mAh

  • via Wall: 6 hours 15 min

  • via USB: 6 hours 15 min

  • via Solar: 8-10 hours


  • 3.7V/3,200mAh Li-Poly - User replaceable at end of life (average 3 years)

Play Time:

1 full CLASSIC2 battery provides the following power:

  • 15 hours of Talk Time or 675 hours Standby Time based on iPhone 4

  • 15 hours of Talk Time or 616 hours Standby Time based on Motorola Droid

  • 11 hours of Talk Time or 3103 hours of Standby Time based on HTC EVO

  • 137 hours of music or 24 hours of video based on iPod Touch 4th Gen

  • 8 hours of operation based on Garmin Nuvi 850


  • 5.8in x 2.8in. x 1.4in - 10.1 oz.

Comes with:

  • Micro-USB to USB Cable - For charging the CLASSIC2 via USB port/USB port wall adapter, can also be used as a charging cord for Micro-USB devices.

  • Pencil - Insert the pencil through the center of the CLASSIC2 to easily prop towards the sun.


Overview, Features, and Specs courtesty the Solio Classic2 Product Page


Solio Classic 2 BoxSolio Classic 2 Box Back

Solio Classic 2 Included Accessories

In addition to Solio's Classic2 solar battery pack and charger, a simple quick start guide, a USB charging cable, and (surprisingly) a.... pencil.  We'll discuss its purpose in a bit.

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