Buy hand wind dynamo power bank, alarm siren, radio and flashlight!

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This device could save your life in as a powerful light, it’s a power bank that you can charge with solar power and the hand crank Dynamo.

So you can keep it charged even if you’re middle of nowhere.

Using the output port you can charge your devices like your phone.

It has a build in radio for AM and FM, you can pull out the antenna for the radio for a better reception.
In case of an emergency you have the SOS button click it twice and this alarm is heard.
The light flashes SOS I bought this device from Amazon it came this box, it was packed well and sturdy included Is a manual and a USB cable you can use this cable to charge the power bank itself or to power other devices using this power bank.

On a light condition you can charge the device using the solar cell.

The power bank has a built-in 2000 ma 18650 Li-ion battery you can keep this charged using the solar cell or the hand crank Dynamo.
When the device is fully charged you can play the radio for around 15 to 18 hours.

The flashlight in work from 10 to 12 hours, eith 1-minute or hand cranking you can use the radio for 5 to 8 minutes and the flashlight for 10 to 50 minutes.

It has a broad range at night it illuminates quite well.
It’s built well it has a water-resistant level of ipx3 it’s defined as water falling as a spray at any angle of 60 degrees.

In case you go on a boat trip  on a boat trip this could be an option for you.

I’m bought this device because I usually walk through nature with my dog Bhima, in case of an emergency I can just this out of my pocket, charge my device, use the flashlight listen to the radio broadcast or let the siren be heard.

I’m happy with this device and everyone should have one especially in your car, in the middle of nowhere and at home.

Click on the link above to get the best price, don’t to forget to subscribe and hit like, thank you for your support and I am looking forward to making more videos for you.
Till next time bye!

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How to make 3D Solar panels MIT discovery (Backyard Revolution)

What is the most efficient solar cell design?

The most efficient solar cell design is currently the multi-junction solar cell. These cells are made up of multiple layers of semiconductor materials, each with a different bandgap, and are able to convert a wider range of the solar spectrum into electricity. The highest efficiency ever recorded for a multi-junction solar cell is 46.1%, achieved by a cell with four layers. The efficiency of a solar cell is measured by the ratio of the electrical power output from the cell to the power of the sunlight incident on the cell, known as the “conversion efficiency.”

What is the most efficient solar light collector?

The most efficient solar light collector is currently the parabolic trough collector. It uses a parabolic mirror to concentrate sunlight onto a receiver tube located at the focal point of the parabola. The concentrated sunlight is used to heat a fluid, which then generates steam to drive a turbine and generate electricity. These systems can have an efficiency of up to 40%.
Another highly efficient technology is the parabolic dish, which uses a parabolic dish-shaped reflector to concentrate sunlight onto a receiver located at the focal point. These systems can achieve efficiencies of up to 31%.
It is worth noting that the efficiency of a solar collector is affected by many factors, including the design and materials used, as well as the location and weather conditions in which it is used, so the most efficient design can vary depending on the specific application and context.

MIT news content:

A new dimension for solar energy

Innovative 3-D designs from an MIT team can more than double the solar power generated from a given area.David L. Chandler, MIT News OfficePublication Date:March 27, 2012

Caption:Two small-scale versions of three-dimensional photovoltaic arrays were among those tested by Jeffrey Grossman and his team on an MIT rooftop to measure their actual electrical output throughout the day.Credits:Photo: Allegra Boverman

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