Garmin Montana 700i Install using Gatmon RAM AMPS mount.

Garmin :

I installed the AMPS mount using the red wire to the battery hot and black wire to the battery ground. I checked the mount for power and the AMPS pins are get power....When I install my new 700i into the mount it does not charge at 50-90% on the battery bar??? It there a smart feature the starts charging the 700i device and below X% of battery??

I have hooked my old Montana 600 to the same power source and charges fine ..

Please advise...   

PS Do you have install instruction for 700i AMPS mount and wiring?

Grant