McLaren P1 Getting Battery Upgrade With Nearly Triple Original Capacity

V Engineering, an independent McLaren specialist based in Berkshire, United Kingdom, has developed a plug-and-play battery replacement for the P1 hypercar that nearly triples the original capacity while reducing weight by 51 pounds.

What Happened

The McLaren P1 debuted in 2013 as the world's first plug-in hybrid hypercar. Its original high-voltage battery held just 4.72 kilowatt-hours of storage, with cells dating back to 2010—a time when EV technology was far less advanced than today. Over more than a decade of use, those early cells have degraded and can no longer deliver expected performance. V Engineering's Project Continuum addresses this with a drop-in replacement pack storing 12.4 kWh using high-performance 21700 lithium-ion cells. The new battery module is designed to meet FIA Formula E requirements and was developed in collaboration with engineers who worked on the original P1 project. Customer installations are scheduled to begin next spring, with V Engineering already talking to owners worldwide about the upgrade.

Why It Matters

For existing P1 owners, degradation has become an increasingly pressing issue as these $1.15 million hypercars age. The upgraded pack restores performance while adding meaningful electric-only range for city driving—a significant improvement over a degraded original battery that likely struggled to deliver even brief all-electric motoring. The 51-pound weight reduction further benefits handling and acceleration in a car still rated at 903 horsepower combined output. Beyond the owner benefit, Project Continuum signals a growing aftermarket path for high-voltage battery refreshes on aging plug-in hybrids and EVs, a market segment that has lacked viable solutions as first-generation vehicles age.

The Bottom Line

V Engineering's Project Continuum offers P1 owners a factory-style upgrade path for an original battery now more than a decade old. With installations beginning next spring and the company in discussions with owners globally, it represents one of the most substantial high-voltage refresh options available for any legacy plug-in hybrid hypercar.