Looking for the Best Chicago Electric Tool 18V Replacement Battery? If are you still actively searching for a replacement battery for your Chicago electric power tools, then likely have been having a hard time. Harbor Freight have discontinued the Chicago electric 18V power tools, and therefore, the replacement batteries have also been discontinued. Your best bet is to check back on this Amazon listing for the Chicago 68860 18V battery. Amazon and its third-party sellers are constantly adding new inventory as they become available.