Svolt Begins Mass Production of 80 kWh PHEV Battery

Chinese battery manufacturer Svolt Energy has begun mass production of a new high-capacity battery designed for plug-in hybrid electric vehicles (PHEVs), branded as the Fortress 2.0.

The 80-kilowatt-hour battery has begun coming off assembly lines at Svolt's facility in Changzhou, Jiangsu province, and stands as the highest-capacity PHEV battery currently available in the Chinese market, the firm announced in a statement released Thursday.

According to the company, the Fortress 2.0's energy capacity marks a 35.6 percent advancement over the preceding generation's 59-kWh unit, and it is chiefly intended for application in larger family-oriented vehicles and rugged off-road driving conditions.

Through a highly compact engineering architecture, the new battery system delivers a 6 percent improvement in both overall space efficiency and energy density relative to its forerunner.

Svolt indicated that D-segment plug-in hybrid models equipped with this battery will likely achieve an all-electric driving range surpassing 400 kilometers, which should substantially cut down on how frequently owners need to recharge.

Furthermore, the battery accommodates peak 6C rapid-charging capability, allowing it to recover sufficient energy for more than 400 kilometers of pure-electric travel in a mere 10 minutes, the company noted.

In terms of thermal protection, the battery pack incorporates nano-thermal ceramic insulation materials for the first time, a measure intended to prevent combustion for up to 30 minutes even when exposed to extreme heat reaching 1,000 degrees Celsius.

Svolt added that the high-capacity PHEV battery will soon make its first appearance in a forthcoming PHEV model slated for unveiling at the Beijing Auto Show, which opens later this month.

Battery sizes for hybrid vehicles in China have been steadily increasing in recent years, driven by consumer demand to overcome concerns about limited range while capitalizing on the lower operating costs of electric-only motoring.

In October 2025, Leapmotor introduced the D19 sport utility vehicle (SUV), with its extended-range electric (EREV) variant incorporating an 80.3-kWh battery supplied by CATL—currently the largest pack fitted to any EREV on record.

The D19 is set to officially launch later today, with the EREV version promising an all-electric range of up to 500 kilometers.

Svolt, a battery enterprise originally carved out from Great Wall Motor, held a 1.84 percent portion of China's total power battery installations for March, based on statistics published by the China Automotive Battery Innovation Alliance (CABIA).