The btrace cold battery of 200 ml will need if in a thermal bag or thermal container for a long time need to maintain a cool temperature.
Working Principle: The battery is filled with water-salt gel solution, which in a chilled form is able to keep the temperature for a long time.
Batteries before use need to be cooled in the freezer.
The btrace cold battery is simply indispensable in traveling, camping, hunting or fishing in the summer.
• Material: plastic, salt solution
• Volume: 200 ml