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May 2013 : Cold fusion reactor independently verified, has 10,000 times the energy density of gas. Against all probability, a device that purports to use cold fusion to generate vast amounts of power has been verified by a panel of independent scientists.

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from About.com Health

Energy Density and the Foods You Eat

Energy Density -- Why Some Foods are Fattening High calorie junk foods have a high energy density - so more calories in fewer bites of food.

Envia Systems has developed a lithium-ion battery which is claimed to have two to three times the energy density of existing li-ions.

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from Verywell

Energy Density and the Foods You Eat

What Is Energy Density?: High calorie junk foods have a high energy density - so more calories in fewer bites of food.

Portion Size, Energy Density and Losing Weight – What Works – AICR Blog

Energy density for weight loss: it’s the key to eating more, but weighing less. If you are looking to lose weight, lowering the energy density of your diet by adding lots of fruits and vegetables is an amazingly simple way to help you lose weight without any deprivation. #howtoloseweight #energydensityforw

Scientists develop new lithium-sulphur battery that offers up to 5x the energy density of Li-ion | Electric Vehicle News

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Sodium-ion battery cathode has highest energy density to date. —Although sodium-ion (Na-ion) batteries don't perform as well as lithium-ion (Li-ion) batteries, they have the potential to be a cheaper alternative. In a new study, scientists have designed a new cathode for Na-ion batteries that provides an energy density of 600 Wh kg-1, which is the highest reported so far for Na-ion batteries and even rivals the energy densities of some Li-ion batteries.