Transmiting while in charging unit

have a Motorola CT150 hand held with a NI-MI batt. does anyone know if it hurts to leave the unit in the charger while transmiting? thanks

I would check the voltage of the charger first, most of them put out more voltage than the battery the radio uses does.
You could fry the radio. However some radios are set up to work while charging,
I would check the manual and if there is no info there, go to the manufacturers
website or e-mail them for the information.