The powerpack has twin saltwater batteries, called CMAB5A BASIC, one parallel cable for 6V, one serial cable for 12V. The power pack has maximum 40Watt.The batteries are stored in an air-tight vacuum sealed pack with collapsed sizes to 40%.
The saltwater batteries are dry-stored magnesium air batteries weights total 1.2 kg including one set of magnesium fuel set (500gram).
The batteries are safe and non toxic and have long shelf lives.
Just open the vinyl pack and apply to your devices.

Containing;
Two collapsible magnesium air batteries
One serial connector for 12V
One parallel connector for 6V

Open the package and connect to your device. The original connection is set at 12V. If you want 6V, then remove the serial cable and use only one battery or two batteries with a parallel connector.
Introduce seawater to the cells then power generates.
Remove the sticky cement when the cells are filled with it, and refill with seawater again.
When you see the magnesium cards are worn out, replace with fresh cards.