The lithium ion battery was first commercialized by Sony two decades ago. Lithium-ion now dominates the world of rechargeable batteries and is led by manufacturers like Panasonic, Sanyo, LG, and Samsung.
The lithium ion battery pack boasts high energy density, low maintenance, and steady improvement. The most economical li-ion battery is the 18650 battery. The LiPo battery, prismatic battery, and LIR coin cell are popular too, offering greater versatility in size and weight.
The future of lithium-ion batteries is increasingly bright. The first mega factory (Tesla's Gigafactory) is already producing the lithium-ion 21700 battery for electric vehicles. Many more mega factories are expected to open up worldwide in the coming years.