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</div><div>A Toyota spokeswoman said the company could not locate any employees who could “provide any additional information on this program.”</div><div>
</div><div>Likewise, the watches with Exxon’s batteries were never made.</div><div>
</div><div>“They said to us with some rationality, ‘We’re a multi-billion dollar company. Why do we need this?’” Hamlen said. “If I were to characterize Exxon’s new ventures in two words, it would be ‘unrealistic expectations.’ They thought that because they were good at oil, they could handle these new ventures in other areas, too.”</div><div>
</div><div>The new web article by Exxon touts Whittingham’s battery as the technology that today “powers laptops, tablets, cellphones and most electric cars.” It doesn’t explain why it shuttered the program.</div><div>
</div><div>Hamlen and Whittingham kept a few of the button-sized watch batteries they made at Exxon. Recently, they tested them for a peer-reviewed paper to see if they would work after 35 years. They found that the batteries had retained more than 50 percent of their original capacity.</div><div>
</div><div>“If you make the battery right,” Whittingham said, “it will last for a very long time.”</div><div>
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