www.theactigraph.comP a g e | 1449 E. Chase St. Pensacola, FL 32502 tel 850.332-7900 fax 850-332-7904Stopping the deviceIn order to stop the device from collecting data, the device needs to be plugged into and computer withthe ActiLife Software running. One easy way to stop the device from collecting data is to set a stop timeduring initialization. Once a device is told to stop, it will go into HALT mode and go into a low powerstopped state. Another way to get a device to stop collecting data is to plug it into a computer with theActiLife Software running and update the firmware on the device. This also will put it into HALT modeand have the device go into a lower power stopped state.Unexpected operations and eventsIf a device performs in an unexpected manner and does not collect data, does not perform as long asexpected, will not download data, or acts in any other manner that is unexpected, notify ActiGraphimmediately. ActiGraph’s Customer Service can be contacted at the phone number (877) 497-6996 andis available every week, Monday through Friday, 8A.M. to 5P.M Central Standard Time. CustomerService may also be contacted through email at support@theactigraph.com.Household InterferenceWithin a household environment many different factors can negatively affect the device. Putting adevice close to hot sources, such as a fireplace and baseboard heater, will melt the housing of a deviceand destroy it. Putting a device in the freezer for extended periods of time will reduce the capacity ofthe battery’s lifespan and negatively affect its performance. Putting a device in a microwave will destroyvarious parts of the device and possibly completely destroy it. Wireless internet connections, wirelesstelevision service, and other wireless services will not negatively affect the performance of the device.As a rule of thumb, do not put the device in extreme cold or hot temperatures and do not apply anyelectrical sources to the device unless explicitly approved and described by ActiGraph.BatteryAll ActiGraph devices use a lithium polymer rechargeable battery that has a maximum voltage ofapproximately 4.20 volts and have a total life expectancy of five (5) years. Even though these batteriesare replaceable, only ActiGraph personnel are to replace the batteries. At 3.1 volts the devices enter alow voltage mode state (HALT mode).In order to slow the aging of the lithium polymer battery, it is recommended that devices be stored in apartially charged state (40 – 60% battery capacity) in low ambient temperatures. Every three (3) monthsplug the devices in to monitor their voltages and to extend the life expectancy of the battery. Table 4demonstrates the impact of storage temperature and charge state on battery long term capacity.