Frequently asked questions and answers

All our backpacks have gone trough European, American, Canadian, Chinese and Israeli Airports without any problems. EU regulations allow you to bring a Lithium Ion or Lithium Polymer battery with you as part of your carry-on luggage.

You can charge multiple devices at the same time with all our Tesbanks (battery banks). With Tesbank 20K you can charge two devices at the same time as it has two types of Output ports. Tesbank 12K on the other hand has three types of Output ports thus allowing you to charge three devices at the same time. However, keep in mind that when charging multiple devices at the same time, your Tesbank will run out of power faster than if charging only one device.

You can charge your iPhone and iPad with all our Tesbanks (battery banks), the adaptor used for IPad can also be used with iPhones. However, please remember that iPhone 5 uses a special adaptor that can be bought in the accessories area. Adapter can be found in our accessories section.
How long does it take to charge my phone?
All phones are different and vary considerably in terms of their battery capacity. For this reason, the charging times vary depending on the phone model you are using.

However, it usually takes the same time to charge your phone with Tesbank (battery bank) as it would take to charge with the original charger.

Here is a table showing how long it will take to fully charge your Tesbank. Please remember that these are approximate charging times as the real charging time depends on the weather conditions, i.e if it is cloudy or temperature.

In order to get best results, you should use the solar panels outside and point the panel directly at the sun.

With AC Charger Rectangle 12W Ellipse 9.5 W Ellipse 8W Ellipse 7W Circle 4W
Tesbank12K Battery 4 5 6 7 8 12
Tesbank 20K Battery 6 8 10 12 13 20

In order to charge your video camera, you will need to have a universal battery charger, which can be found in our accessories section. With the universal charger you can charge almost all video camera batteries as well as other standard batteries. All our Tesbanks (battery bank) work with the universal charger, which means that you will be able to charge your universal charger with any of our Tesbanks.

All our solar panels are made of epoxy resin and fiber glass and thus are 99.9 % waterproof. Our solar panels have been tested in snow, rain and sand, so you can be assured that water, snow or sand will not affect their performance. As with any electronics, you want to keep Tesbank Battery dry and safe, just treat it as you would with your phone or camera. As long as the Tesbank Battery is in your backpack it will be protected from water and dust.

Charge Indicator tells you how much battery life your Tesbank (battery bank) has left.

  • 1st LED light equals around 5-24 %
  • 2nd LED lights equal 25-49 %,
  • 3rd LED lights equal 50-74 % and
  • 4th LED lights equal 75-100 %.

When the light is moving, your Tesbank is charging.

All our solar panels are compatible with any of our Tesbanks (battery banks). As our solar panels come in different shapes and wattage, the only difference is the charging time.

With the Tesbank 20K Battery you can charge laptops and other small electronics, including tablets. You can charge tablets and other small electronics with both the Tesbank 12K and 20K Batteries.