A non-aqueous electrolyte secondary battery has an electrode plate
assembly including a positive electrode, a negative electrode, and a
separator interposed between the positive electrode and the negative
electrode; a non-aqueous electrolyte including a lithium salt and a
non-aqueous solvent; and a gas absorbing element that absorbs gas
produced in the secondary battery, wetting of the gas absorbing element
with the non-aqueous solvent is controlled.