Motorola RMU2040 Guide De L'utilisateur page 28

If there is NO LED indication:
1. Check if the radio with battery or the battery
alone, is inserted correctly (refer to step 5 of
"Charging a Radio and Battery using a Multi
Unit-Charger - MUC (Optional Accessory)" on
page 22).
2. Make sure the power cord is securely plugged
into the MUC and the appropriate AC outlet.
Make sure there is power to the AC outlet.
3. Confirm that the battery being used with the
radio is listed in Table 3.
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