Though most solar panel power banks for your phone can also be charged via a wall outlet, a standard power bank phone charger is less bulky if you don't plan on using the solar panel. You might ...

The design is now mature, and the High Efficiency MPPT Solar Charger is full of features like data logging, boasts a 97% efficiency over a range of 1 to 75 Watts, and can be used as a standalone ...