Motorola WT4090 Battery 101
Installing the Main Battery
Before using the Motorola WT4090 wearable terminal, install a lithium-ion (Li-ion) battery by placing the battery into the wearable terminal as shown below.
Note: Ensure the battery is fully inserted. An audible click can be heard as the battery is fully inserted. A partially inserted battery may result in unintentional data loss.
Removing the Main Battery
To remove the main battery:
- Prior to removing the battery, ensure that the wearable terminal is in suspend mode. If the wearable terminal is not in suspend mode, press the Power button to place the wearable terminal in suspend mode.
- Press the battery release button. The battery partially ejects from the wearable terminal.
- Remove the battery from the wearable terminal.
Charging the Battery
Before using the wearable terminal for the first time, charge the main battery until the amber Charge Status LED remains lit.
The wearable terminal is equipped with a memory backup battery which automatically charges from the main battery whether or not the wearable terminal is operating or is in suspend mode. The memory backup battery retains data in memory for at least 30 minutes when the wearable terminal’s main battery is removed or fully discharged. When the wearable terminal is used for the first time or after the memory backup battery has fully discharged, the memory backup battery requires approximately 15 hours to fully charge. Do not remove the main battery from the wearable terminal for 15 hours to ensure that the memory backup battery fully charges. If the main battery is removed from the wearable terminal or the main battery is fully discharged, the memory backup battery completely discharges in several hours.
When the wearable terminal reaches a very low battery state, the combination of main battery and backup battery retains data in memory for at least 24 hours.
Charge the wearable terminal with an installed main battery using either the Single Slot USB cradle or the Four Slot Ethernet cradle.
To charge the main battery:
- Ensure the cradle used to charge the main battery is connected to the appropriate power source.
- Insert the wearable terminal into a cradle.
- The wearable terminal starts to charge automatically. The amber Charge Status LED lights to indicate the charge status. The standard capacity battery fully charges in less than four hours and the extended battery fully charges in less than eight hours.
| LED | Indication |
| Off | Wearable terminal is not in cradle. Wearable terminal not placed correctly. Charger is not powered. |
| Fast Blinking Amber | Charging error: • Temperature is too low or too high. • Charging has gone on too long without completing (typically eight hours). |
| Slow blinking Amber | Wearable terminal is charging. |
| Solid Amber | Charging complete. Note: When the battery is initially inserted in the wearable terminal, the amber LED flashes once if the battery power is low or the battery is not fully inserted. |
Charging Spare Batteries
Use the following accessories to charge spare batteries:
• Single Slot USB Cradle
• Four Slot Spare Battery Charger.
To charge a spare battery:
- Ensure the accessory used to charge the spare battery is connected to the appropriate power source.
- Insert the spare battery into the accessory’s spare battery charging slot with the charging contacts facing down (over the charging pins) and gently press down on the battery to ensure proper contact.
- The battery starts to charge automatically. The amber charge LED on the accessory lights to show the charge status.
Note: The standard capacity battery fully charges in less than four hours and the extended capacity battery fully charges in less than eight hours.