Is the back-up battery charged by the EFIS system or from ship power?
Depending on the answer to the above, if I have 3 back-up batteries (1 per EFIS Screen) can they be powered by the same circuit?
I will be taking delivery of my AFS soon, but I am trying to configure my VPX-Pro and have run out of available pins. If the back-up batteries can all be powered by the same circuit then I will be saved!