The target, a range up to 1,200 kilometres and a 10 minute charge
A solid state battery replaces the liquid chemical that carries charge inside an ordinary lithium ion battery with a solid material, which battery makers say packs more energy into the same space and charges faster. Toyota announced in 2023 that its first solid state battery could give a car a range of up to 1,200 kilometres, and potentially 1,500 kilometres, on the CLTC cycle, a driving test used in China that the source reporting the figures calls optimistic compared with real world driving. The same announcement targeted a charge from 10% to 80% capacity in 10 minutes or less. A Toyota executive independently restated the same 1,200 kilometre and under 10 minute figures at the Tokyo Motor Show in 2025, 2 years later, with no change to either number.
Both figures are Toyota own stated target for its first solid state battery, on the CLTC cycle, a driving test used in China. The source reporting these figures calls that test optimistic compared with real world driving. Neither figure is a measured result.
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| Solid state target | 1,200 to 1,500 kilometres on the CLTC cycle |
The launch date has slipped 3 times, the range figure has not
Toyota was initially planning to launch a solid state battery powered car in 2020, then pushed the launch back to 2023, then to 2026, according to the same 2025 report from the Tokyo Motor Show. Keiji Kaita, president of the Carbon Neutral Advanced Engineering Development Center at Toyota, confirmed the company is now working to a schedule of 2027 to 2028.
For the all-solid-state battery, the characteristic is high power, compact, and long range.
Keiji Kaita, president of the Carbon Neutral Advanced Engineering Development Center at Toyota. Source 2.
Toyota own annual filing for the fiscal year ended March 31, 2026, submitted to the United States Securities and Exchange Commission under legal liability for false statements, independently confirms that Toyota is still targeting 2027 to 2028 to start selling the battery, without repeating a kilometre or minute figure. That is the 1 figure in this story that 3 separate statements, 3 years apart, have not moved.
Toyota originally planned to launch a car with this battery in 2020. This chart counts how many years later each later target fell, a MAOWCE calculation from the years the same source states. The battery range and charge time targets have not changed across the same period.
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| First delay, 2023 | 3 |
| Second delay, 2026 | 6 |
| Current target, 2028 | 8 |
What Toyota has actually demonstrated so far
Toyota own filing states plainly that its solid state batteries are still, in its own words, approaching the phase of practical application for use in battery electric vehicles, not that they have arrived in a car buyers can purchase. The 1 measured result in that filing is that Toyota has already reduced the size of its solid state batteries by a third compared with conventional batteries, while maintaining performance. Separately, in a laboratory unconnected to Toyota, researchers built a solid state pouch cell, a flat battery casing sealed like a pouch rather than a hard can, using a high loading nickel cobalt manganese cathode, and reached an energy density of 446 watt hours per kilogram, the amount of energy a battery can store for each kilogram it weighs. That is about 65% higher than the 270 watt hours per kilogram or higher that a 2021 review paper states for ordinary lithium ion cells, a MAOWCE calculation across the 2 papers, not a figure either one states on its own.
These 3 figures track ordinary lithium ion cells, not the solid state battery Toyota targets. The 2021 figure is the floor source 4 states, at least 270 watt hours per kilogram, not an exact number. The most recent figure is a liquid electrolyte laboratory pouch cell, not a solid state cell, included only to show how far the surrounding chemistry has moved.
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| 1991, first commercial cell | 120 |
| 2021, ordinary lithium ion | 270 |
| 2026 lab cell, liquid electrolyte | 325 |
What still stands between a lab result and a car in a driveway
Independent, peer reviewed research, written partly by scientists at the research institute Toyota itself runs in North America, is skeptical that laboratory results like these translate into a shipped car on schedule.
Competitive technologies must ultimately demonstrate not only attractive intrinsic materials properties, but also durable, manufacturable performance and a credible path to cost reduction.
the peer reviewed review paper on metal battery anodes, written partly by researchers at Toyota own research institute in North America. Source 4.
That gap, between a single laboratory pouch cell and a battery built at the scale of a car factory, is what the 2027 to 2028 target still has to close.