6 - Operation
DynaFlex II| Product Family | Installation and Operation Manual
Page 40 of 78 (D998200554-10)
6.6
Power Management
6.6.1
About Power
This device incorporates a built-in Lithium-ion rechargeable battery, which requires very little
maintenance. It is not subject to “charge memory” and therefore does not require deep discharge cycles to
restore its charge capacity like many other battery technologies.
When properly powered through its USB port, the device powers on automatically, remains powered on
provided the host does not put it in USB Suspend mode, and draws power both for operation and for
recharging the battery (see section
6.6.3 How to Charge the Battery
). While charging, the device
consumes more power from the USB connection than when the battery is fully charged. The device stops
charging the battery when it determines it is optimally full, to prevent overcharging.
If the device is not connected to USB power, or if the USB connection does not provide enough power,
the device powers itself using the rechargeable battery. When the battery discharges to a critically low
level, the device powers down automatically. It is important to not allow the device’s main battery to
remain completely discharged any longer than necessary. For information about how to prevent this from
occurring during handling and storage, see section
3.2 Handling to Avoid Accidental Tamper
. To
prevent this from occurring during regular use:
•
Do not allow the device’s main battery to remain completely discharged for prolonged periods of
time, and ideally do not allow it to ever reach 0%. Create a charging schedule that recharges the
battery well before it is fully depleted.
•
When the device is not connected to USB power, preserve the battery’s charge when it is not in use by
putting the device into Sleep mode or powering it off completely (see section
On / Wake Up from Standby Mode / Power Off
The device’s rechargeable battery is designed to last hundreds of charging cycles, but with time and / or
with use, its charge capacity will naturally degrade. Following the recommendations in this section will
maintain the battery’s charge capacity for as long as possible.
