Medical device giant Covidien recalls a series of ventilator batteries over reports that they may emit false alarms and prematurely switch to back-up supplies.

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Massachusetts-based medical device maker Covidien (NYSE:COV) announced a voluntary recall of certain Power Pac batteries distributed with its Newport HT70 and HT70 Plus ventilators, according to an FDA notice.

Covidien launched the recall in response to reports that some batteries were resorting to back-up power sooner than expected while operating on the Power Pac battery. In some instances the ventilator may erroneously indicate that the Power Pac is fully charged, and in other instances the ventilator may resort to a backup battery as soon as its unplugged from AC power, the company said.