A lithium-ion battery or Li-ion battery (abbreviated as LIB) is a type of rechargeable battery. Lithium-ion batteries are commonly used for portable electronics and electric vehicles. The batteries have a high energy density, no memory effect (other than LFP cells), and low self-discharge. We at Robu have the best lithium-ion batteries in various capacities, voltages, sizes, and at the best price. Scroll down to see more.