No signs of battery leakage. Built from 1979 to 1983. There is crack on the back plastic as the battery cover also have a crack and it's loose due that. The metal guide for the batteries is also missing.I've used one from other unit to turn it on. For sure not difficult to find a new one or not needed if you use a new battery pack. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Calculators". The seller is "andrer01" and is located in this country: PT. This item can be shipped to North, South, or Latin America, all countries in Europe, all countries in continental Asia, Australia.