Geely says its next-generation solid-state EV battery will reach an energy density of up to 500 Wh/kg, and it’s already running the cells through real-world validation ahead of a pilot rollout in 2027.

That number is the whole story. At 500 Wh/kg, Geely’s cells would hold roughly twice the energy per kilogram of the best lithium-ion battery packs shipping in EVs today.

The best high-nickel NMC cells in production EVs land around 250 to 300 Wh/kg at the cell level. Tesla’s 4680 sits near 245 Wh/kg. LFP cells, the chemistry powering most affordable EVs, come in lower still. At the pack level, once these cells are in modules and pack, the enegery density per kg drops even further.

Zeekr’s current “Golden Brick” LFP pack is rated around 128 Wh/kg at the pack level.

So a cell at 500 Wh/kg isn’t an incremental gain. It’s a doubling.

Doubling energy density changes the math on every EV. You can keep the same range and cut the battery’s weight roughly in half, or keep the same weight and push range way up. A lighter pack means a lighter car, which needs less structure and less battery to hit the same numbers. The savings compound.

Geely is selling the range version of that trade. The company says vehicles running these cells will get a range “comparable to diesel-powered cars,” over 1,000 km on a single charge. It also claims a lifespan of up to 1 million km (621,000 miles).

The batteries are being developed inside Geely Holding, the parent that owns Geely, Zeekr, Lynk & Co, Volvo, Polestar, Lotus, and Smart.

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