Elecom’s 9,000mAh sodium-ion battery offers superior safety and longevity The first sodium-ion mobile battery sets new standards but remains costly Retains temperature of -35°C to 50°C in ...

Sodium is abundantly available in sea salt, as well as in the crust of the earth. Now, back to that power bank. Elecom's portable puck costs 9,980 JPY (US$67) in Japan, and is available in limited ...