Mercedes finds battery flaw behind recent F1 retirements

Mercedes has identified a recurring battery issue within its power unit as the cause of recent race-ending failures for its drivers, a problem the team says it now understands and is working to resolve. Technical director James Allison stated that while the specific failures have not been identical, they originate from the same general area of the battery system, and that updated components are being prepared for introduction.

The reliability setbacks have marred an otherwise dominant start to the 2026 Formula 1 season for Mercedes, which has won six of the first seven races. The team's latest troubles occurred at the Spanish Grand Prix in Barcelona, where Kimi Antonelli retired from second place near the end of the race. This followed a similar failure for George Russell while he was leading the Canadian Grand Prix weeks earlier.

Allison, speaking on a team podcast, explained that engineers have pinpointed the risk areas. He expressed confidence that the issues should diminish as new battery modules are phased into the team's pool of power units throughout the season. The failures are not confined to the works team; customer squad McLaren has also experienced electrical-related...