Yes, the trickle charger should help.

Charging not only for this, but also for ALOT of applications IMO.
I've been putting the cars on a charger just to keep the batteries to the brim.
It keeps the batteries in a full state - absorbed as much as it can.
If ~mitigates~ shallow cycle battery

Fast forward. AFAIK, the new M4 uses Lithium Batteries.
I can only imagine what the replacement cost on that battery is once out of warranty....