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Fisker joins Dyson, Toyota and other companies hoping to bring solid-state batteries to market in the next five years.

Fisker has reportedly filed patent applications for its solid-state batteries, billed as superior to traditional liquid-electrolyte cells in nearly every measure -- if the 'breakthrough' technology can be brought to market.The company's website references "400+ mile range" and "nine-minute charging to 125 mi." The patent application is said to describe a technology that could a 2.5-fold increase in energy density, with a range of 500 miles and charge times as low as one minute, according to details posted by Auto Connected Car News.

The claims already sound too good to be true, but the real kicker is Fisker's estimate that solid-state batteries will cost a third of the 2020 projected price of lithium-ion cells.

Solid-state batteries are not exactly a new idea. Scientists and engineers have been experimenting with the technology in the lab for many years. Many ideas that are theoretically better than current lithium-ion cells in terms of energy density have failed to become a viable alternative due to shortcomings in production cost, charge cycle durability, temperature range or a long list of other critical factors.

Fisker may be an underdog in the race but several bigger players are also placing serious bets on solid-state batteries. Dyson -- one of the largest global manufacturers of rechargeable batteries -- plans to use the technology to power an EV by 2020. Toyota is aiming to start building solid-state batteries in the same timeframe.