Operation Manual

when the ET1’s main battery is removed, when Battery swap feature is used. When the ET1 reaches a very low
battery state, the combination of main battery and backup battery retains RAM data in memory for at least 36 hours.
For cable and cradle setup and charging procedures see Accessories on page 79.
• USB/Charge Cable
• Single-slot USB Docking Cradle
• Four-slot Charge Only Docking Cradle.
To charge the main battery:
1 Connect the charging accessory to the appropriate power source. See Accessories on page 79 for more
information.
2 Insert the ET1 into a cradle or attach to a cable. The ET1 begins charging. The Battery Charge LEDs blink yellow
while charging, then turns solid green when fully charged. See Table 2: Battery Charge LED Status on page 20
for charging indications.
The battery charges in less than six hours.
Table 2: Battery Charge LED Status
Status Indications
Off ET1 is not inserted correctly in the cradle. ET1 is not connected to a power
source. Charger or cradle is not powered.
Slow Blinking Yellow (3 blinks ev-
ery 2 seconds)
ET1 is charging.
Solid Green Charging complete.
Fast Blinking Yellow (2 blinks/
second)
Charging error, e.g.:
• Temperature is too low or too high.
• Charging has gone on too long without completion (typically eight hours).
Flashes Yellow three times when
Power button pressed
Critical battery state. Battery too low to boot device.
Fast Blinking Yellow (when Power
button pressed)
Battery over-temperature condition. Device shuts down. Battery will not
charge until temperature returns to normal operating value.
Charging Temperature
Charge batteries in temperatures from 0 °C to 40 °C (32 °F to 104 °F). Note that charging is intelligently controlled
by the ET1. To accomplish this, for small periods of time, the ET1 or accessory alternately enables and disables
battery charging to keep the battery at acceptable temperatures. The ET1 or accessory indicates when charging is
disabled due to abnormal temperatures via its LED. See Table 2: Battery Charge LED Status on page 20.
Charging Spare Batteries
See Accessories on page 79 for information on using accessories to charge spare batteries.
Powering On the ET1
Press the Power button until the Battery Charge LED flashes three times. The splash screen displays for about a
minute as the ET1 initializes its flash file system. Note that these windows also appear upon reset.
20 | Getting Started
February 2015 | MN000022A02-A