Didn't need it but I miss keys and I think this thing was pretty good in its day. Unfortunately I didn't check for leakage in the store, they get upset if you open the package before buying. It had carbon-zinc batteries with a little leakage that rinsed away with tap water, but the backup battery was horrendous. Thing won't power up, I suppose I'll have open it and clean it/fix it. Or just toss it in storage.