Incompatible older power cables with new MacBook Pro

New MacBook Pro has MagSafe power cord. I had 3 power cords for previous MacBookPro, at various work stations. Is there a safe adaptor available to convert old power cables for new MagSafe ports?

http://store.apple.com/us/product/MD504ZM/A/magsafe-to-magsafe-2-converter?fnode =51

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