For the battery, sir. Charging a radio while in use is IMO asking for a spike or drop to toast circuits. Not a good thing when spares may not be handy.

Charging my deep cycle will be done with all else off line. This means that eventually I shall have to have two or more and a rotary switch to swap over to a ready to go battery while I'm charging another... which is fine, I prefer old fashioned knife type switches or other hard switches. Computer controlled switching stands too much of a chance of failing open or closed permanently, under the clumsiest of circumstances possilble, per Murphy.