Interesting that it would drain the batteries with the remote off. I haven’t got to that point yet (up to 130). If we had a hard (actual) switch on the remote then that would disable all power to remote ( thus no leakage), but we have a soft switch, which just turns the remote control computer on and off. When the remote is off there is still power going to the pcb (computer standby mode), so there must be current leakage ‘somewhere’ on the board. There’s no way to resolve this problem without rewriting the software for the remote or to add an actual micro on/off switch to the remote (cost a couple of dollars and half an hour to install. Alternatively, just reverse one of the batteries in the battery pack to break the circuit.
That’s my thoughts. 🙂
FYI - I’m not an expert on ship remote controls, but have 35 years experience on military guidance systems… if that helps.