IF Chris uses the CK-078 from Uniden it does allow TX but its not a "charger" as such but will maintain battery.
The new BK-02 comes with various filters/ground loop eliminators, as well as 2 x switched and filtered 12V supplies that go on / off with the BikeComm

, currently running this setup my self and the switched power is driving the (car type) UHF and GPS for me.
A lot of handhelds will either TX ok and not RX well or TX like crap and RX nicely when powered, they are all sadly now built to a price rather than a standard

. it now comes down to "suck it and see" if you power a handheld.
I'll give you a ring around 11:00 Chris