Li Auto is expanding the use of battery cells developed to its own specifications and manufactured by Sunwoda, reducing its dependence on CATL for several upcoming electric vehicles.
The company’s 5C cells are already associated with selected L8, L6 and i8 configurations, with a broader rollout planned in the fourth quarter of 2026.
New orders for the Mega Home are expected to switch to the in-house design, with initial deliveries planned for November.
The move does not mean Li Auto is building every cell inside its own factories. Instead, the automaker defines key product requirements, materials, structure and battery-management strategy, while Sunwoda handles cell manufacturing.
This model gives Li Auto more influence over how the battery is integrated into each vehicle without having to create a complete manufacturing base from zero.
What 5C charging indicates
The “5C” label describes a theoretical charging rate relative to battery capacity. In simple terms, a 5C rate would equal five times the pack’s ampere-hour capacity under defined conditions.
It does not mean a vehicle will remain at maximum power throughout a charging session. Temperature, state of charge, cell chemistry, charger output and software limits all shape the real curve.
For drivers, the useful metric is elapsed time over a common window such as 10 to 80 percent.
Li Auto’s strategy is clearly aimed at making charging stops feel closer to a conventional break. Achieving that consistently requires more than a cell: the vehicle needs high-voltage hardware, effective cooling, accurate controls and a charger capable of supplying the requested power.
Self-developed cells can help the automaker tune those pieces together.
If engineers know the cell’s resistance, thermal behavior and aging characteristics in detail, they can design the pack and charging software around it.
That integration may improve repeatability, although independent testing will still be needed to show how the vehicles perform in summer heat, winter cold and repeated high-power use.
A long relationship with Sunwoda
Li Auto and Sunwoda have worked together since 2017. Their connection has deepened financially: Li Auto has invested 2.65 billion yuan, roughly $390 million at the reported exchange rate, in Sunwoda’s electric-vehicle battery business.
Its total stake is now 11.17 percent, making it the second-largest shareholder.
That investment aligns the two companies without fully merging them. Sunwoda contributes manufacturing experience and scale;It handles production expertise, while Li Auto contributes vehicle data and product direction.
The arrangement can shorten feedback loops when a cell needs adjustment for charging, packaging or performance. It can also diversify supply at a time when battery availability, cost and geopolitical risk remain central to automotive planning.
CATL is not disappearing from Li Auto’s products.
Reports indicate the i9 will begin with CATL cells and transition when sufficient capacity of the self-developed cells is available. A staged approach lowers launch risk and shows why multiple suppliers remain valuable even when an automaker wants more internal control.
Which vehicles are affected
The 2026 i6 is expected to receive the 5C cells along with Li Auto’s own Mach-Chip, with deliveries planned for early November.
The L8, L6 and i8 are also part of the broader battery rollout, while new Mega Home orders are moving to the in-house specification.
Exact availability can differ by trim and production period, so customers should confirm the battery supplier and charging specification for the individual vehicle they order.
That detail matters because two versions of the same model may use different cells while offering similar advertised performance.
Automakers often qualify multiple suppliers to protect production. The customer-facing experience should remain consistent, but charging curves, cold-weather behavior or long-term degradation can vary slightly.
Clear labeling and comparable warranty terms help build trust.
Europe adds a new dimension
Li Auto is also preparing to show the Li 6 at the Paris Motor Show in October, with European sales expected to begin in the fourth quarter.
The company plans to offer only battery-electric vehicles in Europe, a notable decision for a brand that built much of its Chinese success around extended-range models.
The Li 6 will enter a demanding market. European customers expect strong safety performance, reliable software localization, transparent privacy practices and an effective service network.
Fast charging can attract attention, but ownership support will decide whether interest becomes lasting confidence.
Pricing, homologated WLTP range and market coverage remain important unanswered questions.
An in-house battery specification could help Li Auto adapt the product for Europe. Engineers can tune thermal management and charging behavior for local conditions and infrastructure, while supply-chain control may support pricing.
At the same time, regulatory approval and cell traceability will place additional demands on both Li Auto and Sunwoda.
Why vertical integration matters
Battery cells are among the most expensive and strategically important parts of an EV.
Greater control can reduce cost, improve packaging and protect an automaker from relying too heavily on one supplier.
It can also create risk: cell development requires deep expertise, capital and years of validation, and a manufacturing issue can affect several vehicle lines at once.
Li Auto’s partnership model spreads those responsibilities. The automaker owns more of the design intent, while an established specialist manufactures the cells.
If the rollout meets its charging and durability goals, it could become a useful example of vertical integration without full vertical ownership.
The positive takeaway is broader competition in battery development.
CATL remains a global leader, but automakers and alternative suppliers are building new capabilities rather than treating cells as interchangeable commodities.
For drivers, that competition can lead to shorter charging stops, better-integrated packs and more resilient production.
