While keeping batteries small and light is definitely a factor with electronic devices in general, it becomes particularly important when dealing with wearable electronics such as smart glasses. With that in mind, Panasonic has just announced its CG-320. Measuring 20 x 3.5 mm, it’s being billed as “the industry’s smallest cylindrical shaped rechargeable Lithium Ion battery.”
The CG-320 weighs 0.6 grams, has a nominal capacity of 13 mAh, a nominal voltage of 3.75 volts, and a maximum charging voltage of 4.2 volts. It also has a stainless steel exterior case, designed to prevent swelling.
For more detail: Panasonic’s tiny new battery is destined for the wearables market
French 
English