This product or service includes a Lithium-ion battery. Will not blend with good waste stream. Spent batteries should be disposed of by a qualified recycler or hazardous elements handler for every neighborhood polices.K?t Qu? X? S? K?t Qu? X? S? Mi?n Nam K?t Qu? X? S? Mi?n Trung K?t Qu? X? S? Mi?n B?c KQXS Các T?nh KQXS ?i?n Toán X? s? ?i?n toán