Boston Scientific Corporation has announced multiple recalls of its pacemaker devices following the discovery of significant battery defects that internal company testing shows the manufacturer was aware of for several years.

The medical device company has publicly stated that its battery issues were limited in scope, but internal documentation reveals a different picture of the problems affecting the cardiac devices.

According to internal test results from 2025, Boston Scientific found that certain pacemaker batteries exhibited what company documents described as an "extremely high failure rate." The testing data contradicts the company's public characterization of the battery problems as limited.

Pacemakers are critical medical devices implanted in patients to regulate heart rhythms, and battery failures can potentially pose serious health risks to patients who depend on the devices for proper cardiac function.

The recalls affect multiple pacemaker models, though Boston Scientific has not disclosed the full extent of devices that may be impacted by the battery defects identified in the internal testing.

The company has not immediately responded to requests for additional comment about the timeline of when it first became aware of the battery problems or what steps it took following the discovery of the high failure rates in testing.