1 - 4 ET1 Enterprise Tablet Integrator Guide
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 Chapter 2, Accessories.
•
USB/Charge Cable
•
Single-slot USB Docking Cradle
•
Four-slot Charge Only Docking Cradle
•
Four-slot Battery Charger.
To charge the main battery:
1. Connect the charging accessory to the appropriate power source.
2. Insert the ET1 into a cradle or attach to a cable. The ET1 begins charging. The Battery Charge LED blinks
yellow while charging, then turns solid green when fully charged. See Table 1-1 for charging indications.
The battery fully charges in approximately six hours.
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 1-1.
Charging Spare Batteries
See Chapter 2, Accessories for information on using accessories to change spare batteries.
Table 1-1
Battery Charge LED Status
Status Indication
Off ET1 is not charging.
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 every 2 seconds)
ET1 is charging.
Solid Green Fully charged.
Fast Blinking Yellow
(3 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 level. 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.
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