(JP9097627-A)      A non-aq. electrolyte comprises (a) a Li salt, and (b) a non-aq. solvent comprising a mixt. of a halogen-substd. ether cpd. of formula R1-O-R2 (I) and at least one other cpd., the solvent being capable of dissolving the Li salt in an amt. of not less than 0.5 mole/l. In (I), R1 = alkyl or halogen-substd. alkyl gp. having 2 C atoms; and R2 = halogen-substd. alkyl gp. having 2-10C.    Also claimed is a lithium secondary battery comprising a cathode that can be doped/undoped with lithium ions, an anode of lithium metal or alloy that can be doped/undoped with lithium ions, and the above non-aq. electrolyte.    USE -   The secondary lithium battery is useful for lap-top computers, portable telephones, and personal digital assistants.    ADVANTAGE -   The battery has improved cycle life for repeating charging/discharging and low temp. capacity, partic. superior in high-rate capacity, and causes little deterioration of high-rate capacity due to cycles.    (US5795677-A)      A non-aq. electrolyte comprises (a) a Li salt, and (b) a non-aq. solvent comprising a mixt. of a halogen-substd. ether cpd. of formula R1-O-R2 (I) and at least one other cpd., the solvent being capable of dissolving the Li salt in an amt. of not less than 0.5 mole/l. In (I), R1 = alkyl or halogen-substd. alkyl gp. having 2 C atoms; and R2 = halogen-substd. alkyl gp. having 2-10C.    Also claimed is a lithium secondary battery comprising a cathode that can be doped/undoped with lithium ions, an anode of lithium metal or alloy that can be doped/undoped with lithium ions, and the above non-aq. electrolyte.    USE -   The secondary lithium battery is useful for lap-top computers, portable telephones, and personal digital assistants.    ADVANTAGE -   The battery has improved cycle life for repeating charging/discharging and low temp. capacity, partic. superior in high-rate capacity, and causes little deterioration of high-rate capacity due to cycles.    (TW360987-A)      A non-aq. electrolyte comprises (a) a Li salt, and (b) a non-aq. solvent comprising a mixt. of a halogen-substd. ether cpd. of formula R1-O-R2 (I) and at least one other cpd., the solvent being capable of dissolving the Li salt in an amt. of not less than 0.5 mole/l. In (I), R1 = alkyl or halogen-substd. alkyl gp. having 2 C atoms; and R2 = halogen-substd. alkyl gp. having 2-10C.    Also claimed is a lithium secondary battery comprising a cathode that can be doped/undoped with lithium ions, an anode of lithium metal or alloy that can be doped/undoped with lithium ions, and the above non-aq. electrolyte.    USE -   The secondary lithium battery is useful for lap-top computers, portable telephones, and personal digital assistants.    ADVANTAGE -   The battery has improved cycle life for repeating charging/discharging and low temp. capacity, partic. superior in high-rate capacity, and causes little deterioration of high-rate capacity due to cycles.    (CN1151619-A)      A non-aq. electrolyte comprises (a) a Li salt, and (b) a non-aq. solvent comprising a mixt. of a halogen-substd. ether cpd. of formula R1-O-R2 (I) and at least one other cpd., the solvent being capable of dissolving the Li salt in an amt. of not less than 0.5 mole/l. In (I), R1 = alkyl or halogen-substd. alkyl gp. having 2 C atoms; and R2 = halogen-substd. alkyl gp. having 2-10C.    Also claimed is a lithium secondary battery comprising a cathode that can be doped/undoped with lithium ions, an anode of lithium metal or alloy that can be doped/undoped with lithium ions, and the above non-aq. electrolyte.    USE -   The secondary lithium battery is useful for lap-top computers, portable telephones, and personal digital assistants.    ADVANTAGE -   The battery has improved cycle life for repeating charging/discharging and low temp. capacity, partic. superior in high-rate capacity, and causes little deterioration of high-rate capacity due to cycles.