This is the first ever semi-solid-state battery going into a production e-bike

Solid-state batteries have long been the holy grail of electric vehicles, especially for light EVs like electric bicycles that are usually charged indoors. They hold major safety benefits over traditional lithium-ion batteries, plus offer better energy density, making it possible to use smaller batteries or simply fit more capacity in the same-sized battery pack.

Solid-state batteries have spent decades being touted as five years away, but if you thought you’d have to keep waiting, then I’ve got news for you: yes, you still have to keep waiting.

However, in the meantime, semi-solid-state batteries are here and will be launched on their first production e-bike next month.

I had the chance to check out the batteries in person at EICMA 2025 when I visited with the company that makes them, was spun out of e-bike component maker Bafang (and founded by the same co-founder of Bafang, Sunny He) in order to move more in the direction of electric motorcycle component development.

Advertisement - scroll for more content

In addition to their drivetrain components, a significant portion of their R&D has also focused on semi-solid-state batteries, which contain a minimal amount of electrolyte compared to traditional lithium-ion batteries found in today’s e-bikes. With a fraction of the electrolyte material, these semi-solid-state batteries developed by T&D are more energy-dense and safer than traditional batteries. The cells can be stabbed through by a nail and won’t ignite – don’t try that with the battery on your current e-bike!

Whereas most e-bike batteries today have an energy density of around 150-250 Wh/kg, these new semi-solid-state batteries push the needle even further into the 250-350 Wh/kg ballpark, depending on the specific packaging.

The cells are also rated for long cycle lifespan, with an expected 1,500 charge cycles before reaching 70% of the original capacity. And with fast-charging support, those same cells can be recharged significantly more quickly.

T&D’s semi-solid-state batteries will roll out on their first production e-bike next month, though the company isn’t at liberty to announce which e-bike maker will land the title of first production electric bike with semi-solid-state batteries. Hopefully we’ll hear that announcement soon.

T&D is also known for its e-moto drivetrains. The company’s new Equator City commuter e-moped project, launched in collaboration with Dimentro, utilizes T&D’s swingarm-mounted motor system.

The drivetrain offers 11 kW of peak power, a 5 kWh high-capacity LFP battery, and supports a range of over 100 km (62 miles).

Other projects featuring T&D’s drivetrains at the booth included interesting examples such as a part go-kart, part tractor project that resembles a heavy-towing ATV.