Complete the Words

Lithium-ion batteries power most phones, laptops and electric cars because they store a lot of energy in a small, light package. When a (1)bat____ is charged, (2)lit____ (3)io__ (4)mo__ from one (5)si__ of the (6)ce__ to the (7)ot___ and are (8)sto___ (9)ins___ (10)lay___ of graphite. When the battery is in use, the ions flow back, and the electrons they release travel through the device as an electric current. Each cycle of charging and use slightly wears down these materials, which is why an old battery holds less energy than a new one.