The SP10 battery is a 7.5V Ni-Cd or Ni-MH pack, and proper charging is key to its longevity.
Press and release the Monitor button to reset the squelch circuit. Low battery voltage Instruction Manual For Motorola Radius Sp10
If you need help configuring or managing your vintage radio equipment, please let me know: The SP10 battery is a 7
Check if an audio accessory is partially plugged into the side connector, as this can mute the internal speaker. | Problem | Possible Cause | Solution |
| Problem | Possible Cause | Solution | | :---------------------- | :--------------------------------------- | :------------------------------------------------------------------------------------------------------------------------------------ | | | Dead/defective battery. | Charge the battery overnight. If the problem persists, replace the battery pack. | | No transmission | PTT button is stuck or dirty. | Check the PTT for debris; try pressing it firmly. | | Can't hear others | Volume is down. | Rotate the On/Off Volume knob clockwise to raise the volume. | | | The radio is not set to the same frequency as the other radio. | Access the DIP switches under the battery and verify they match the settings of the other radio. | | Short battery life | Battery is old or was deeply discharged. | Replace the battery pack, especially if it is the original Ni-Cd type. Moving to a higher-capacity Ni-MH pack is a good upgrade. | | Constant static | Frequency is set to a "quiet" channel. | Reprogram the radio to a different, active frequency. |