Arc Reactor Mark-I

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The Original Miniaturized Arc Reactor was created by Tony Stark and Ho Yinsen while being held captive by the Ten Rings in Afghanistan. Captured to build the Jericho missile, Stark, with the help of Yinsen, instead used the Ten Rings' spare parts and old Stark-Tech missiles to create a miniaturized palladium-cored Arc reactor to power Tony's electromagnet that keeps the shrapnel of one of Stark's own missiles from reaching his heart. Capable of generating 3 GJ/s, it can keep Stark's heart running for 50 lifetimes, as mentioned by Yinsen. To which Stark responded to that with "Yeah, or something big for 15 minutes". The reactor was later replaced by the Mark II model when Tony returned to the US with the help of Pepper Potts. Tony was forced to don the reactor again after his Mark II model was stolen.Following Tony's death, the original arc reactor was floated in a lake with the inscription "Proof That Tony Stark Has A Heart" around it as a form of memorial.