Seasons greeting Mikrotik. If you're going to do a mUPS hardware refresh at some point in the future, can you consider a low voltage disconnect feature? At the moment we add an in-line one with the battery(s) but it would be a much nicer product if one were included. As it can already detect when the battery is low and when it's charging it shouldn't be too difficult/expensive to implement.
Also, would you condenser a mUPS version that took an array of lithium 18650D batteries? Would make a real nice one box solution that could be pole mounted.