French researchers have announced a prototype of an 18650 sodium ... few thousand of these cells. The number might seem like a strange choice, but it maps to the cell size (18 mm in diameter ...

This is wonderful, since our projects come in all shapes and sizes – some will be fine with 18650, some can be powered by a smartphone battery or an ultrabook-scavenged flat cell, some are small ...

The advancement was inspired by the growing demand for higher battery energy density, making the development of high-voltage electrolytes compatible with lithium anodes and LiNixC ...

The 18650 cylindrical battery design is commonly used ... advances can still come in smaller sizes. Other examples include magnesium coin-cell packs being developed in Canada and aquatic bacteria ...