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    • Variety of smoke detectors in an office cupboard.
    Rights: The University of Waikato Te Whare Wānanga o Waikato Published 3 November 2009 Size: 1.8 MB Referencing Hub media

    Fire engineer Mike Spearpoint keeps smoke detectors in his office cupboards. He is testing the duration of the batteries. Some have lasted for 10–11 years.

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      Testing smoke alarm batteries

      If had gone into Dr Mike Spearpoint’s office at the University of Canterbury and quietly stood still, you could have heard lots of beeping noises. If you ask him what the noises are, he will tell ...

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