The returned device was evaluated.During evaluation, the device was able to power on using both ac and dc power.When powered on the device was able to obtain readings and alarmed audibly and visually under alarm conditions.The device was charged overnight, the unit remained on for approximately one hour prior to sounding a low battery alarm and shutting down.Internal inspection showed the top shell has cosmetic damage on the inside and that the battery voltage measured 6.2 vdc.The device did not turn off by itself during testing however the battery does not hold an adequate charge.A service history record review reveals that this unit was in the field for over seven (7) years with no previous reported issues related to this reported event.
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